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Vitamins, Minerals &
Nutrients
VITAMINS
What Are Vitamins and
What Do They Do?
If you've ever walked through the aisles of your local grocery or
health food store, you may have wondered about the purpose and
importance of various vitamins. Vitamins are organic compounds
that help maintain normal body functions, such as reproduction,
growth and cell repair. Vitamins work with other vitamins and
other substances like enzymes to help your cells function
correctly, and an adequate consumption of vitamins is necessary
for your body to work well. Your body can't manufacture vitamins,
so you need to obtain them from other sources.
Most of the vitamins you need come from the food you eat, except
for vitamin D, which your body makes when exposed to sunlight, and
K, which is made by the bacteria in your intestines. In addition
to their presence in natural foods, vitamins can also be
manufactured synthetically.
Some people who feel that they aren't getting enough vitamins in
the foods they eat or who have a health condition such as
pregnancy will take a synthetic vitamin to ensure adequate vitamin
intake. Vitamin supplements may be available in tablet, caplet or
liquid form. Although the Food and Drug Administration (FDA)
regulates vitamin supplements, they do not have established
standards for quality. However, the United States Pharmacopeia
recently established standards for vitamin supplements, so look
for supplements that say "USP" on the product label.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Water-soluble vitamins, which include the
B-complex group and vitamin C, travel through the bloodstream.
Whatever water-soluble vitamins are not used by the body are
eliminated in urine, which means you need a continuous supply of
them in your food.
Fat-soluble vitamins—vitamins A, D, E and K—are stored in the fat
tissues of the body for a few days to up to 6 months. If you get
too much of a fat-soluble vitamin, it can be stored in your liver
and may sometimes cause health problems.
If you want to get the most vitamins possible from your food,
refrigerate fresh produce and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that's free of
moisture.
Top
Biotin
Biotin is necessary for the formation
of fatty acids and glucose, which are used as fuels by the body.
Biotin also helps to break down amino acids and carbohydrates in
the body.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Water-soluble vitamins, which include the
B-complex group and vitamin C, travel through the bloodstream.
Whatever water-soluble vitamins are not used by the body are
eliminated in urine, which means you need a continuous supply of
them in your food. Biotin is a water-soluble vitamin.
How Much Biotin Is Enough?
There is no recommended daily allowance for biotin because
biotin deficiencies are extremely rare. A normal daily biotin
intake for teens and adults is 30 to 100 micrograms a day.
Sources of Biotin
-
Liver
-
Cauliflower
-
Salmon
-
Carrots
-
Bananas
-
Cereals
-
Yeast
Can You Have Too Much or Too
Little?
A lack of biotin in the body is rare, but certain skin
conditions or genetic deficiencies may cause biotin deficiencies
in infants. Biotin deficiency may cause skin rash, hair loss, high
cholesterol levels and heart problems.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that's free of
moisture.
Top
Vitamin A
(Retinol)
Vitamin A, also called retinol, helps
your eyes adjust to light changes when you come in from outside
and also helps keep your eyes, skin and mucous membranes moist.
Vitamin A mostly comes from animal foods, but some plant-based
foods supply beta-carotene, which your body then converts into
Vitamin A. It also has antioxidant properties that neutralize free
radicals in the body that cause tissue and cellular damage.
Early information from scientific studies suggests that
beta-carotene might help people who already have Coronary Artery
Disease (CAD). The American Heart Association doesn't recommend
taking supplements of beta-carotene until more is known, however.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Fat-soluble vitamins—vitamins A, D, E and
K—are stored in the fat tissues of the body for a few days to up
to six months. If you get too much of a fat-soluble vitamin, it
can be stored in your liver and may sometimes cause health
problems. Vitamin A is a fat-soluble vitamin.
Some people take mega-doses of fat-soluble vitamins, which can
lead to toxicity. Eating a normal diet of foods rich in these
vitamins won't cause a problem. Remember, you only need small
amounts of any vitamin. In the case of vitamin A, over consumption
has been linked with an increased risk of fractures in
postmenopausal women.
Some health problems can make it hard for a person's body to
absorb these vitamins. If you have a chronic health condition, ask
your doctor about whether your vitamin absorption will be
affected.
How Much Vitamin A Is Enough?
It's recommended that women consume 800 mcg and men consume 1000
mcg of vitamin A daily.
Sources of Vitamin A
Top sources of vitamin A include:
-
Beef liver
-
Egg yolk
-
Cheddar cheese
-
Fortified milk
Top sources of beta-carotene include:
Can You Have Too Much or Too
Little?
Vitamin A deficiency is rare in Canada and the USA, but it can
cause night blindness, eye inflammation, diarrhea and other
problems. Over consumption of vitamin A can cause nausea,
irritability and blurred vision in its mild form. In addition, the
palms of the hands and the bottoms of the feet can turn orange if
a person has a high intake of Vitamin A. Vitamin A toxicity can
cause growth retardation, hair loss and enlarged spleen and liver
in its more severe form. Vitamin A overdose can also cause birth
defects and has been linked to increased risk of bone fractures in
some people.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce, and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that's free of
moisture.
Top
Vitamin B1
(Thiamin)
Vitamin B1, also known as thiamin, helps fuel your body by
converting blood sugar into energy. It keeps your mucous membranes
healthy and is essential for nervous system, cardiovascular and
muscular function.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Water-soluble vitamins, which include the
B-complex group and vitamin C, travel through the bloodstream.
Whatever water-soluble vitamins are not used by the body are
eliminated in urine, which means you need a continuous supply of
them in your food. Vitamin B1 is a water-soluble vitamin.
How Much Vitamin B1 Is Enough?
Women should have 1.1 milligrams every day, and men should have
1.5 milligrams every day.
Sources of Vitamin B1
The best sources of Vitamin B1 are yeasts and liver. The following
foods are good sources of Vitamin B1:
Can You Have Too Much or Too
Little?
It's pretty rare in Canada or the USA for a person to be
deficient in this vitamin. A lack of it can cause beriberi, a
condition that involves confusion, muscle wasting, nerve problems
and a rapid heartbeat. It's usually only seen in the United States
in babies who are fed formula that isn't supplemented with Vitamin
B1 or in people who drink large amounts of alcohol. People who
drink heavily should talk to their doctors about how to quit
drinking and whether they need vitamin B1 supplements.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that's free of
moisture.
Top
Vitamin B2
(Riboflavin)
Vitamin B2, also called riboflavin, works with other vitamins in
the B complex to process calories from carbohydrates, protein and
fat. Your body needs it for growth and red cell production, and
adequate riboflavin intake promotes healthy skin and good vision.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Water-soluble vitamins, which include the
B-complex group and vitamin C, travel through the bloodstream.
Whatever water-soluble vitamins are not used by the body are
eliminated in urine, which means you need a continuous supply of
them in your food. Vitamin B2 is a water-soluble vitamin.
How Much Vitamin B2 Is Enough?
Women should have 1.1 milligrams of riboflavin daily and men
should have 1.7 milligrams daily.
Sources of Vitamin B2
Can You Have Too Much or Too
Little?
Riboflavin deficiency is not common in the United States because
it is plentiful in the food supply. Lack of riboflavin will cause
eye sensitivity to light, skin rash and cracks at the corners of
the mouth.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that’s free of
moisture.
Top
Vitamin B3
(Niacin)
Vitamin B3 is also called niacin. Like all the B-complex vitamins,
it is important for converting calories from protein, fat and
carbohydrates into energy. But it also helps the digestive system
function and promotes a normal appetite and healthy skin and
nerves.
Larger doses of niacin—sometimes more
than 1,000 milligrams a day—have also been shown to reduce LDL
cholesterol (the 'bad' cholesterol that clogs the heart's
arteries) and triglycerides and raise HDL cholesterol (the 'good'
cholesterol that prevents hardening of the artery walls). However,
you should only take increased doses of niacin under the
supervision of a physician.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Water-soluble vitamins, which include the
B-complex group and vitamin C, travel through the bloodstream.
Whatever water-soluble vitamins are not used by the body are
eliminated in urine, which means you need a continuous supply of
them in your food. Vitamin B3 is a water-soluble vitamin.
How Much Vitamin B3 Is Enough?
Women should have 15 milligrams each day and men should have 15 to
19 milligrams each day. Tryptophan is an amino acid that serves as
a Vitamin B3 equivalent. Sixty milligrams of tryptophan is equal
to 1 milligram of vitamin B3.
Sources of Vitamin B3
Can You Have Too Much or Too
Little?
The first signs of a vitamin B3 deficiency are muscular weakness,
inability to eat, indigestion and skin problems. In its worst
form, a deficiency results in pellagra, which is a serious disease
with symptoms such as diarrhea, mental confusion and skin
problems.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that’s free of
moisture.
Top
Vitamin B5
(Panththenic Acid)
The body uses pantothenic acid, also known as vitamin B5, to break
down carbohydrates, proteins and fats for energy.
Some claims have been made that pantothenic acid is effective for
treatment of nerve damage, breathing problems, itching and other
skin problems, but these claims have not been proven in clinical
trials.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Water-soluble vitamins, which include the
B-complex group and vitamin C, travel through the bloodstream.
Whatever water-soluble vitamins are not used by the body are
eliminated in urine, which means you need a continuous supply of
them in your food. Vitamin B5 is a water-soluble vitamin.
How Much Pantothenic Acid Is Enough?
Lack of pantothenic acid in the diet is rare, so there is no
recommended daily intake for this vitamin. Often, pantothenic acid
is included in B-complex multivitamins. Normal daily intake of
pantothenic acid for adults is 4 to 7 milligrams.
Sources of Pantothenic Acid
Can You Have Too Much or Too
Little?
Pantothenic acid does not usually
cause any side effects, although pregnant and breastfeeding
mothers should be careful to consume only the normal daily intake.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that’s free of
moisture.
Top
Vitamin B6
(Pyridoxine)
Vitamin B6, also known as pyridoxine, helps brain function and
helps the body convert protein to energy. Some research has shown
that vitamin B6 works with folic acid and B12 to reduce levels of
homocysteine (an amino acid) in the blood. Elevated homocysteine
levels can increase a person's risk of heart attack.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Water-soluble vitamins, which include the
B-complex group and vitamin C, travel through the bloodstream.
Whatever water-soluble vitamins are not used by the body are
eliminated in urine, which means you need a continuous supply of
them in your food. Vitamin B6 is a water-soluble vitamin.
How Much Vitamin B6 Is Enough?
Women need 1.6 milligrams of B6 every day, and men need 2
milligrams.
Sources of Vitamin B6
-
Poultry
-
Pork
-
Fish
-
Eggs
-
Soybeans
-
Oats
-
Whole grains
-
Bananas
-
Nuts and seeds
Can You Have Too Much or Too
Little?
Taking regular high doses of vitamin B6 over 250 milligrams
per day may cause nerve damage. In addition pregnant and
breastfeeding mothers should not take more than the recommended
daily amount of vitamin B6 because too much pyridoxine can cause
harm to the developing fetus or infant.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that’s free of
moisture.
Top
Vitamin B9
(Folic Acid)
Folic acid, also known as folate, is important for the production
and maintenance of new cells. This is especially necessary during
both pregnancy and infancy when cell growth is extremely rapid.
Both adults and children need folic acid to make normal red blood
cells and to prevent anemia.
Having enough folic acid in early pregnancy can prevent birth
defects, including problems with the spine (neural tube defects)
and brain. Women who become pregnant and don't consume enough
folate are also more likely to have babies who have low
birth weight or are premature.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Water-soluble vitamins, which include the
B-complex group and vitamin C, travel through the bloodstream.
Whatever water-soluble vitamins are not used by the body are
eliminated in urine, which means you need a continuous supply of
them in your food. Vitamin B9 is a water-soluble vitamin.
How Much Folic Acid Is Enough?
Men need 200 micrograms per day of folic acid, and women who
cannot become pregnant need 180 micrograms per day of folic acid.
If you are a woman who plans to or could become pregnant, you need
to eat foods fortified with folic acid. You may also need to take
a supplement to be sure you're getting 400 micrograms per day.
Once you are pregnant, your intake should be 400 micrograms per
day. Breastfeeding mothers need 280 micrograms per day.
Sources of Folic Acid
Can You Have Too Much or Too
Little?
Folate deficiency can cause diarrhea, anemia, loss of
appetite, weight loss, sore tongue and a variety of other
symptoms. In a developing fetus, folic acid deficiency may cause
birth defects such as spina bifida and anencephaly.
People who drink large amounts of alcohol may need extra folic
acid to prevent a deficiency. Sometimes, treatment of anemia with
folic acid will mask an anemia caused by a vitamin B2 deficiency.
Always consult with your doctor before taking a large amount of
any vitamin supplement.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that’s free of
moisture.
Top
Vitamin B12
(Cobalamin)
Vitamin B12, also known as cobalamin, works with folic acid to
produce healthy red blood cells. Vitamin B12 also keeps your
central nervous system healthy. The only natural sources of
Vitamin B12 are animal products.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Water-soluble vitamins, which include the
B-complex group and vitamin C, travel through the bloodstream.
Whatever water-soluble vitamins are not used by the body are
eliminated in urine, which means you need a continuous supply of
them in your food. Vitamin B12 is a water-soluble vitamin.
How Much B12 Is Enough?
Both adult men and women need 2.0 micrograms of vitamin B12 each
day.
Sources of Vitamin B12
-
Meat
-
Milk products
-
Eggs
-
Cheese
-
Chicken
-
Fish
Can You Have Too Much or Too
Little?
B12 deficiency can cause a type of anemia marked by fewer but
larger red blood cells that's called pernicious anemia. It can
also cause walking and balance problems, sore tongue, weakness,
confusion and, in advanced cases, dementia. Vegetarians who
eliminate all animal sources from their diet (also known as
vegans) may benefit from taking a vitamin B12 supplement. If you
are pregnant or breastfeeding, do not take vitamin B12 in doses
greater than the RDA for pregnant (2.6 micrograms/day) or
breastfeeding women (2.8 micrograms/day). Some people who have
problems with absorption or have had bowel surgery may need
injections of Vitamins B12 to prevent deficiency because their
bodies can't absorb oral supplements properly. People over age 50
may also need B12 supplements because the aging process diminishes
the body’s ability to absorb vitamin B12 from natural food
sources.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce, and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that's free of
moisture.
Top
Vitamin C
(Ascorbic Acid)
Vitamin C, also known as ascorbic acid, helps to heal wounds,
prevent cell damage, promote healthy gums and teeth, and
strengthen the immune system. It also helps the body absorb iron.
Recent research has indicated that vitamin C may be associated
with delayed aging and disease prevention by destroying 'free
radicals'-the molecules associated with aging and cell damage.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Water-soluble vitamins, which include the
B-complex group and vitamin C, travel through the bloodstream.
Whatever water-soluble vitamins are not used by the body are
eliminated in urine, which means you need a continuous supply of
them in your food. Vitamin C is a water-soluble vitamin.
How Much Vitamin C Is Enough?
Women and men should consume at least 60 milligrams of vitamin C
each day.
People who smoke need to consume more vitamin C because smoking
interferes with the body's ability to use vitamins. Women who
smoke should consume 110 milligrams per day of vitamin C, and men
who smoke should consume 125 milligrams per day of vitamin C.
Sources of Vitamin C
-
Citrus juices and fruits
-
Tomatoes
-
Berries
-
Potatoes with skins
-
Green and red peppers
-
Broccoli
-
Spinach
Can You Have Too Much or Too
Little?
Vitamin C deficiency causes a disease called scurvy, which is
uncommon in the United States. Taking more than 2,000 milligrams a
day may cause a flushed face, headache, increased urination, mild
diarrhea, nausea and vomiting. Pregnant and breastfeeding women
shouldn’t take more than the daily recommended amounts of vitamin
C.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce, and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that's free of
moisture.
Top
Vitamin D
Vitamin D is important in helping the
body absorb and use calcium from food and supplements. It aids in
bone and tooth formation and supports muscle and nerve function,
and studies have shown that vitamin D helps to prevent
osteoporosis.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Fat-soluble vitamins—vitamins A, D, E and
K—are stored in the fat tissues of the body for a few days to up
to six months. If you get too much of a fat-soluble vitamin, it
can be stored in your liver and may sometimes cause health
problems. Vitamin D is a fat-soluble vitamin.
Some people take mega-doses of fat-soluble vitamins, which can
lead to toxicity. Eating a normal diet of foods rich in these
vitamins won't cause a problem. Remember, you only need small
amounts of any vitamin.
Some health problems can make it hard for a person's body to
absorb these vitamins. If you have a chronic health condition, ask
your doctor about whether your vitamin absorption will be
affected.
How Much Vitamin D Is Enough?
The National Institutes of Health recommend that men and women
ages 19 to 50 consume a minimum of 200 IU (or 5 mcg) of vitamin D
each day. People ages 51 and over should consume at least 400 IU
(or 10 mcg) of vitamin D daily. The need for vitamin D increases
with age because your body’s ability to convert sunlight to
vitamin D decreases.
You should always eat foods or supplements rich in vitamin D with
foods rich in calcium for better absorption. When you are exposed
to the sun’s rays, your body converts a cholesterol compound in
the skin to vitamin D, so aim for three 15-minute sessions of sun
exposure a week.
Sources of Vitamin D
-
Fortified milk
-
Fortified cereals
-
Eggs
-
Tuna
-
Fish-liver oils
-
Sun exposure
Can You Have Too Much or Too
Little?
Too little vitamin D in the diet can lead to weakened bones and an
increased risk of fractures.
Over consuming vitamin D can cause nausea, vomiting, poor
appetite, constipation, weakness and weight loss. Calcinosis, the
deposition of calcium and phosphate in soft tissues like the
kidney, can be caused by vitamin D toxicity.
Antacids, some cholesterol lowering drugs, mineral oil, some
anti-seizure medications, and steroids interfere with the
absorption of vitamin D.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce, and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that's free of
moisture.
Top
Vitamin E
Vitamin E acts as a powerful
antioxidant by neutralizing free radicals in the body that cause
tissue and cellular damage. Vitamin E also contributes to a
healthy circulatory system and aids in proper blood clotting and
improves wound healing. Some studies have shown that vitamin E
decreases symptoms of premenstrual syndrome and certain types of
breast disease.
Other studies have shown that taking large doses of Vitamin E has
decreased the risk of Coronary Artery Disease (CAD). Animal
studies have suggested that vitamin E does slow the development of
atherosclerosis, but the American Heart Association doesn't
recommend using supplements until the effects are proven in
large-scale, carefully controlled clinical trials.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Fat-soluble vitamins—vitamins A, D, E and
K—are stored in the fat tissues of the body for a few days to up
to six months. If you get too much of a fat-soluble vitamin, it
can be stored in your liver and may sometimes cause health
problems. Vitamin E is a fat-soluble vitamin.
Some people take mega-doses of fat-soluble vitamins, which can
lead to toxicity. Eating a normal diet of foods rich in these
vitamins won't cause a problem. Remember, you only need small
amounts of any vitamin.
Some health problems can make it hard for a person's body to
absorb these vitamins. If you have a chronic health condition, ask
your doctor about whether your vitamin absorption will be
affected.
How Much Vitamin E Is Enough?
Women need 8 milligrams and men need 10 milligrams of vitamin E
daily.
Sources of Vitamin E
Can You Have Too Much or Too
Little?
It's almost impossible to have a vitamin E deficiency, but too
much can cause nausea and digestive tract problems.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce, and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that’s free of
moisture.
Top
Vitamin K
Vitamin K is necessary for blood
clotting. Without it, even a small cut would cause continuous
bleeding in the body. Vitamin K also plays an important role in
kidney function and bone growth and repair - some studies have
even shown that it may help prevent osteoporosis.
Nutritionists categorize vitamins by the materials that a vitamin
will dissolve in. There are two categories: water-soluble and
fat-soluble vitamins. Fat-soluble vitamins—vitamins A, D, E and
K—are stored in the fat tissues of the body for a few days to up
to 6 months. If you get too much of a fat-soluble vitamin, it can
be stored in your liver and may sometimes cause health problems.
Vitamin K is a fat-soluble vitamin.
Some people take mega-doses of fat-soluble vitamins, which can
lead to toxicity. Eating a normal diet of foods rich in these
vitamins won't cause a problem. Remember, you only need small
amounts of any vitamin.
Some health problems can make it hard for a person's body to
absorb these vitamins. If you have a chronic health condition, ask
your doctor about whether your vitamin absorption will be
affected.
How Much Vitamin K Is Enough?
Women should consume 65 micrograms a day of vitamin K, and men
should consume 80 micrograms a day of vitamin K.
Sources of Vitamin K
About half of the vitamin K necessary for good health is supplied
by bacteria living in the intestine, but dietary consumption of
vitamin K is also important. Good sources of vitamin K include:
Can You Have Too Much or Too
Little?
Newborns are especially prone to vitamin K deficiency, so the
American Academy of Pediatrics recommends vitamin K
supplementation. Vitamin K deficiency in adults is rare but it may
occur in people with conditions such as cystic fibrosis and celiac
disease whose bodies cannot absorb vitamins from foods properly.
When it occurs, vitamin K deficiency may cause bleeding gums and
skin that is easily bruised.
Vitamin K toxicity is also rare, but you should not take doses of
more than 500 micrograms without talking to your doctor. Vitamin K
may interfere with the effectiveness of medications such as
anticoagulants (also known as blood thinners), so talk to your
doctor before using a supplement that contains vitamin K.
Vitamin Storage
If you want to get the most vitamins possible from your food,
refrigerate fresh produce and keep milk and grains away from
strong light. Vitamins are easily destroyed and washed out during
food preparation and storage. If you take vitamin supplements,
store them at room temperature in a dry place that's free of
moisture.
Top
Vitamin Toxicity
Definition
Vitamin toxicity is a
condition in which a person develops symptoms as side effects
from taking massive doses of vitamins. Vitamins vary in
the amounts that are required to cause toxicity and in the
specific symptoms that result. Vitamin toxicity, which is also
called hypervitaminosis or vitamin poisoning, is
becoming more common in developed countries because of the
popularity of vitamin supplements. Many people treat
themselves for minor illnesses with large doses (megadoses) of
vitamins.
Description
Overview
Vitamins are organic molecules
in food that are needed in small amounts for growth,
reproduction, and the maintenance of good health. Some
vitamins can be dissolved in oil or melted fat. These
fat-soluble vitamins include vitamin D, vitamin E, vitamin A
(retinol), and vitamin K. Other vitamins can be dissolved in
water. These water-soluble vitamins include folate (folic
acid), vitamin B12, biotin, vitamin B6,
niacin, thiamin, riboflavin, pantothenic acid, and vitamin C
(ascorbic acid). Taking too much of any vitamin can produce a
toxic effect. Vitamin A and vitamin D are the most likely to
produce hypervitaminosis in large doses, while riboflavin,
pantothenic acid, biotin, and vitamin C appear to be the least
likely to cause problems.
Vitamins in medical
treatment
Vitamin supplements are used
for the treatment of various diseases or for reducing the risk
of certain diseases. For example, moderate supplements of
folic acid appear to reduce the risk for certain birth
defects (neural tube defects), and possibly reduce the
risk of cancer. Therapy for diseases brings with it the
risk for irreversible vitamin toxicity only in the case of
vitamin D. This vitamin is toxic at levels which are only
moderately greater than the recommended dietary allowance
(RDA). Niacin is commonly used as a drug for the treatment of
heart disease. Niacin is far less toxic than vitamin D.
Vitamin toxicity is not a risk with medically supervised
therapy using any of the other vitamins.
Vitamin megadoses
With the exception of folic
acid supplements, the practice of taking vitamin supplements
by healthy individuals has little or no relation to good
health. Most adults in the United States can obtain enough
vitamins by eating a well-balanced diet. It has, however,
become increasingly common for people to take vitamins at
levels far greater than the RDA. These high levels are
sometimes called vitamin megadoses. Megadoses are harmless for
most vitamins. But in the cases of a few of the vitamins--
specifically vitamin D, vitamin A, and vitamin B6--
megadoses can be harmful or fatal. Researchers have also
started to look more closely at megadoses of vitamin C and of
vitamin E, since indirect evidence suggests that these two
vitamins may reduce the risks of cancer, heart disease, and
aging. It is not yet clear whether megadoses of either of
these vitamins has any influence on health. Some experts think
that megadoses of vitamin C may protect people from cancer. On
the other hand, other researchers have gathered indirect
evidence that vitamin C megadoses may cause cancer.
Causes and symptoms
Fat-soluble vitamins
VITAMIN D
Vitamin D and vitamin A are
the most toxic of the fat-soluble vitamins. The symptoms of
vitamin D toxicity are nausea, vomiting, pain in the
joints, and loss of appetite. The patient may experience
constipation alternating with diarrhea, or have
tingling sensations in the mouth. The toxic dose of vitamin D
depends on its frequency. In infants, a single dose of 15 mg
or greater may be toxic, but it is also the case that daily
doses of 1.0 mg over a prolonged period may be toxic. In
adults, a daily dose of 1.0-2.0 mg of vitamin D is toxic when
consumed for a prolonged period. A single dose of about 50 mg
or greater is toxic for adults. The immediate effect of an
overdose of vitamin D is abdominal cramps, nausea and
vomiting. Toxic doses of vitamin D taken over a prolonged
period of time result in irreversible deposits of calcium
crystals in the soft tissues of the body that may damage the
heart, lungs, and kidneys.
VITAMIN A
Vitamin A toxicity can occur
with long-term consumption of 20 mg of retinol or more per
day. The symptoms of vitamin A overdosing include accumulation
of water in the brain (hydrocephalus), vomiting,
tiredness, constipation, bone pain, and severe headaches. The
skin may acquire a rough and dry appearance, with hair loss
and brittle nails. Vitamin A toxicity is a special issue
during pregnancy. Expectant mothers who take 10 mg
vitamin A or more on a daily basis may have an infant with
birth defects. These birth defects include abnormalities of
the face, nervous system, heart, and thymus gland. It is
possible to take in toxic levels of vitamin A by eating large
quantities of certain foods. For example, about 30 grams of
beef liver, 500 grams of eggs, or 2,500 grams of mackerel
would supply 10 mg of retinol. The livers of polar bears and
other arctic animals may contain especially high levels of
vitamin A.
VITAMIN E
Megadoses of vitamin E may
produce headaches, tiredness, double vision, and diarrhea in
humans. Studies with animals fed large doses of vitamin E have
revealed that this vitamin may interfere with the absorption
of other fat-soluble vitamins. The term absorption means the
transfer of the vitamin from the gut into the bloodstream.
Thus, large doses of vitamin E consumed over many weeks or
months might result in deficiencies of vitamin D, vitamin A,
and vitamin K.
VITAMIN K
Prolonged consumption of
megadoses of vitamin K (menadione) results in anemia, which is
a reduced level of red blood cells in the bloodstream. When
large doses of menadione are given to infants, they result in
the deposit of pigments in the brain, nerve damage, the
destruction of red blood cells (hemolysis), and death.
A daily injection of 10 mg of menadione into an infant for
three days can kill the child. This tragic fact was discovered
during the early days of vitamin research, when newborn
infants were injected with menadione to prevent a disease
known as hemorrhagic disease of the newborn. Today a different
form of vitamin K is used to protect infants against this
disease.
Water-soluble vitamins
FOLATE
Folate occurs in various forms
in food. There are over a dozen related forms of folate. The
folate in oral vitamin supplements occurs in only one form,
however--folic acid. Large doses of folic acid (20 grams/day)
can result in eventual kidney damage. Folate is considered,
however, to be relatively nontoxic, except in cases where
folate supplementation can lead to pernicious anemia.
VITAMIN B12
Vitamin B12 is
important in the treatment of pernicious anemia. Pernicious
anemia is more common among middle-aged and older adults; it
is usually detected in patients between the ages of 40 and 80.
The disease affects about 0.1% of all persons in the general
population in the United States, and about 3% of the elderly
population. Pernicious anemia is treated with large doses of
vitamin B12. Typically, 0.1 mg of the vitamin is
injected each week until the symptoms of pernicious anemia
disappear. The patient then takes oral doses of vitamin B12
for the rest of his or her life. Although vitamin B12
toxicity is not an issue for patients being treated for
pernicious anemia, treatment of these patients with folic acid
may cause problems. Specifically, pernicious anemia is often
first detected because the patient feels weak or tired. If the
anemia is not treated, the patient may suffer irreversible
nerve damage. The problem with folic acid supplements is that
the folic acid treatment prevents the anemia from developing,
but allows the eventual nerve damage to occur.
VITAMIN B6
Vitamin B6 is
clearly toxic at doses about 1000 times the RDA. Daily doses
of 2-5 grams of one specific form of this vitamin can produce
difficulty in walking and tingling sensations in the legs and
soles of the feet. Continued megadoses of vitamin B6
result in further unsteadiness, difficulty in handling small
objects, and numbness in the hands. When the high doses are
stopped, recovery begins after two months. Complete recovery
may take two to three years.
VITAMIN C
The RDA for vitamin C in
adults is 60 mg per day. Large doses of vitamin C are
considered to be toxic in persons with a family history of or
tendency to form kidney stones or gallbladder stones.
Kidney and gallbladder stones usually consist of calcium
oxalate. Oxalate occurs in high concentrations in foods such
as cocoa, chocolate, rhubarb, and spinach. A fraction of the
vitamin C in the body is normally broken down in the body to
produce oxalate. A daily supplement of 3.0 grams of vitamin C
has been found to double the level of oxalate that passes
through the kidneys and is excreted into the urine.
NIACIN
The RDA for niacin is 15-19 mg
per day in adults. Niacin comes in two forms, nicotinic acid
and nicotinamide. Either form can satisfy the adult
requirement for this vitamin. Nicotinic acid, however, is
toxic at levels of 100 times the RDA. It can cause flushing of
the skin, nausea, diarrhea, and liver damage. Flushing is an
increase in blood passing through the veins in the skin, due
to the dilation of arteries passing through deeper parts of
the face or other parts of the body. In spite of the side
effects, however, large doses of nicotinic acid are often used
to lower blood cholesterol in order to prevent heart disease.
Nicotinic acid results in a lowering of LDL-cholesterol ("bad
cholesterol"), an increase in HDL-cholesterol ("good
cholesterol"), and a decrease in plasma triglycerides.
Treatment involves daily doses of 1.5-4.0 grams of nicotinic
acid per day. Flushing of the skin occurs as a side effect
when nicotinic acid therapy is started, but may disappear with
continued therapy.
Diagnosis
The diagnosis of vitamin
toxicity is usually made on the basis of the patient's dietary
or medical history. Questioning the patient about the use of
vitamin supplements may shed light on some of his or her
physical symptoms. With some vitamins, the doctor can confirm
the diagnosis by ordering blood or urine tests for specific
vitamins. When large amounts of the water-soluble vitamins are
consumed, a large fraction of the vitamin is absorbed into the
bloodstream and promptly excreted into the urine. The
fat-soluble vitamins are more likely to be absorbed into the
bloodstream and deposited in the fat and other tissues. In the
cases of both water-soluble and fat-soluble vitamins, any
vitamin not absorbed by the intestines is excreted in the
feces. Megadoses of many of the vitamins produce diarrhea,
because the non-absorbed nutrient draws water out of the body
and into the gut, resulting in the loss of this water from the
body.
Treatment
In all cases, treatment of
vitamin toxicity requires discontinuing vitamin supplements.
Vitamin D toxicity needs additional action to reduce the
calcium levels in the bloodstream because it can cause
abnormally high levels of plasma calcium (hypercalcemia).
Severe hypercalcemia is a medical emergency and may be treated
by infusing a solution of 0.9% sodium chloride into the
patient's bloodstream. The infusion consists of two to three
liters of salt water given over a period of one to two days.
Prognosis
The prognosis for reversing
vitamin toxicity is excellent for most patients. Side effects
usually go away as soon as overdoses are stopped. The
exceptions are severe vitamin D toxicity, severe vitamin A
toxicity, and severe vitamin B6 toxicity. Too much
vitamin D leads to deposits of calcium salts in the soft
tissue of the body, which cannot be reversed. Birth defects
due to vitamin A toxicity cannot be reversed. Damage to the
nervous system caused by megadoses of vitamin B6
can be reversed, but complete reversal may require a recovery
period of over a year.
Prevention
Vitamin toxicity can be
prevented by minimizing the use of vitamin supplements. If
vitamin D supplements are being used on a doctor's orders,
vitamin toxicity can be prevented by monitoring the levels of
plasma calcium. The development of hypercalcemia with vitamin
D treatment indicates that the patient is at risk for vitamin
D toxicity.
Key Terms
- Absorption
- The transfer of a vitamin
from the digestive tract to the bloodstream.
Ascorbic acid
- Another name for vitamin
C.
- Hypercalcemia
- Hypercalcemia is a
condition marked by abnormally high levels of calcium in
the blood. It is an issue during vitamin D toxicity.
Hypervitaminosis
- Another name for vitamin
toxicity.
Megadose
- A very large dose of a
vitamin, taken by some people as a form of
self-medication.
- Menadione
- A synthetic form of
vitamin K. It is sometimes called vitamin K.
- Recommended Dietary
Allowance (RDA)
- The recommended dietary
allowances (RDAs) are the quantities of nutrients in the
diet that are needed for good health. RDAs are established
by the Food and Nutrition Board of the National Academy of
Sciences and may be revised every few years.
Retinol
- Another name for vitamin
A.
For Your Information
Books
-
Brody, Tom. Nutritional
Biochemistry. San Diego: Academic Press, 1998.
-
Combs, Gerald. The
Vitamins. San Diego: Academic Press, Inc., 1992.
-
Food and Nutrition Board.
Recommended Dietary Allowances. 10th ed. Washington, DC:
National Academy Press, 1989.
Periodicals
-
Markestad, T., et al.
"Intermittent Digh-dose Vitamin D Prophylaxis During
Infancy: Effect on Vitamin D Metabolites, Calcium, and
Phosphorus." American Journal of Clinical Nutrition 46
(1987): 652-658.
-
Tzimas, G., et al. "Embryotoxic
Doses of Vitamin A to Rabbits Result in Low Plasma but High
Embryonic Concentrations of All-trans-retinoic Acid: Risk of
Vitamin A Exposure in Humans." Journal of Nutrition 126
(1996): 2159-2171.
Source: Gale
Encyclopedia of Medicine, Published December, 2002 by the Gale
Group
Top
MINERALS
Minerals help the body perform
numerous functions, such as building strong bones, transmitting
nerve impulses, making hormones and maintaining a regular
heartbeat.
There are two types of minerals - macrominerals and trace
minerals. Your body needs larger amounts of macrominerals like
calcium, sodium and potassium. Trace minerals, on the other hand,
are only needed in small amounts. Common trace minerals include
iron, zinc, selenium and chromium.
Calcium
Minerals help the body perform numerous functions, such as
building strong bones, transmitting nerve impulses, making
hormones and maintaining a regular heartbeat.
There are two types of minerals - macrominerals and trace
minerals. Your body needs larger amounts of macrominerals like
calcium, sodium and potassium. Trace minerals, on the other hand,
are only needed in small amounts. Common trace minerals include
iron, zinc and selenium.
Calcium is an important macromineral that is absolutely necessary
for healthy bones and teeth. It helps your heart and nerves
function properly and helps your blood to clot.
Scientists used to think that calcium intake was important only up
to age 20 to 30, when bone growth and development are complete.
Research has made clear that adequate calcium intake is important
throughout life. It's especially important for young women and
women entering menopause to get enough of this essential mineral.
How Much Calcium Is Enough?
The recommended dietary allowance (RDA) for calcium is:
-
1,000 milligrams a day for women and men ages 19 to 50
-
1,200 milligrams a day for men and women age 51 and older
-
1,000 milligrams a day for pregnant or breastfeeding women
Individuals who have had bariatric surgery with a malabsorption
component such as the Duodenal Switch or the Roux-en-Y Gastric
Bypass may require 1800 mg of elemental calcium (citrate) daily
taken in 3 intervals.
Taking antacids made of calcium carbonate or vitamin supplements
with calcium can also help supplement some individual's dietary
intake of calcium. Take calcium supplements between meals, not
with food, for best results. But don't rely only on calcium
supplements - only about 40% of calcium is absorbed from
supplements. For example, if you took a calcium carbonate
supplement that contained 600 milligrams of calcium, you'll only
absorb about 240 milligrams. Make sure that calcium-rich foods are
a part of your daily diet.
Good Sources of Calcium
-
Milk (low- or non-fat varieties are best if you are watching your
fat intake)
-
Yogurt
-
Cheese
-
Green leafy vegetables, such as spinach, kale, broccoli, bok choy,
collards and Chinese cabbage
-
Tofu
-
Canned salmon or any fish with bones
-
Calcium-fortified juices
Can You Have Too Much or Too Little?
According to the National Library of Medicine, an intake of up to
2,000 milligrams a day from foods appears to be safe. However,
some foods that are high in calcium are also high in oxalic acid,
which interferes with the body's ability to absorb calcium.
Spinach, collard greens and kale are oxalic-rich foods. There may
be an increased risk of kidney stones in persons susceptible to
kidney stones who have high calcium intakes.
Too little calcium in the diet can lead to calcium deficiency and
osteoporosis, a weakening of the bones that puts people at
increased risk for fractures. People with calcium deficiencies may
also suffer from dental problems and hypertension.
Taking more minerals than you need won't make you healthier. In
some cases taking too much of a mineral can make it hard for your
body to absorb other vitamins. But you don't want to be deficient
in minerals, either. You can avoid vitamin and mineral
deficiencies by eating a wide variety of fruits, vegetables,
protein sources, whole grains and dairy products every day.
Special Considerations
People who are lactose intolerant (a condition in which people are
unable to process the sugar in milk) may find that they have fewer
choices of calcium-rich foods. Lactose-free milk and lactase
enzymes may enable a lactose-intolerant person to consume milk and
dairy products in addition to plant sources of calcium. In some
cases, a health practitioner may recommend a person take a calcium
supplement for added protection.
Steroid medications decrease calcium absorption. If you are taking
this medication, talk to your health care provider about calcium
supplements.
Top
CALCIUM -
http://www.nof.org/prevention/calcium_supplements.htm
Calcium is essential for many body functions, including regulation
of the heartbeat, conduction of nerve impulses, stimulation of
hormone secretions and clotting of blood, as well as for building
and maintaining a healthy skeleton.
Calcium is a mineral found in many foods and adequate calcium
intake is important because the human body cannot produce calcium.
Even after reaching full skeletal growth, adequate calcium intake
is important because the body loses calcium every day through shed
skin, nails, hair, and sweat as well as through urine and feces.
This lost calcium must be replaced daily through the diet. When
the diet does not contain enough calcium to perform these
activities, calcium is taken from the bones, the storage area for
calcium.
The National Academy of Sciences and the National Osteoporosis
Foundation recommend daily calcium intakes of 1000-1200 mg/day for
adult men and women. According to experts, food is the best source
of calcium; however, most Americans do not have enough calcium in
their diets. Fortunately, calcium-fortified foods and calcium
supplements can fill the gap, ensuring that the daily calcium
requirement is met. The amount needed from a supplement depends on
how much calcium is consumed from food sources.
Calcium exists in nature only in combination with other substances
called compounds. Several different calcium compounds are used in
supplements, including calcium carbonate, calcium phosphate and
calcium citrate. These compounds contain different amounts of
elemental calcium, which is the actual amount of calcium in the
supplement. It is important to read the label carefully to
determine how much elemental calcium is in the supplement and how
many doses or pills to take.
Calcium supplements are available without a prescription in a wide
range of preparations and strengths, which can make selecting one
a confusing experience. Many people ask which calcium supplement
they should take; the "best" supplement is the one that meets an
individual’s needs based on tolerance, convenience, cost and
availability. In choosing a calcium supplement, the following are
important considerations:
Purity
Choose calcium supplements that are known brand names with proven
reliability. Look for labels that state "purified" or have the USP
(United States Pharmacopeia) symbol. Since applying for the USP
symbol is voluntary, however, many fine products may not display
this symbol. Avoid calcium from unrefined oyster shell, bone meal
or dolomite without the USP, as these historically have contained
higher lead levels or other toxic metals.
Absorbability
Most brand name calcium products are absorbed easily in the body.
If the product information does not state that it is absorbable,
how well a tablet dissolves can be determined by placing it in a
small amount of warm water for 30 minutes, stirring it
occasionally. If it hasn’t dissolved within this time it probably
will not dissolve in the stomach. Chewable and liquid calcium
supplements dissolve well because they are broken down before they
enter the stomach.
Calcium, whether from the diet or supplements, is absorbed best by
the body when it is taken several times a day in amounts of 500 mg
or less, but taking it all at once is better than not taking it at
all. Calcium carbonate is absorbed
best when taken with food. Calcium citrate can be taken any time.
Tolerance
While calcium supplements generally are a satisfactory option for
many people, certain preparations may cause side effects, such as
gas or constipation, in some individuals. If simple measures such
as increased fluids and fiber intake do not solve the problem,
another form of calcium should be tried. Also, it is important to
increase supplement intake gradually; take 500 mg a day for a
week, then add more calcium slowly.
Calcium Interactions
It is important to talk with a physician or pharmacist about
possible interactions between prescription or over-the-counter
medications and calcium supplements. For example, calcium
supplements also may reduce the absorption of the antibiotic
tetracycline. Calcium also interferes
with iron absorption, so a calcium supplement should not be taken
at the same time as an iron supplement. The exception
to this is when the iron supplement is taken with vitamin C or
calcium citrate. Any medication to be taken on an empty stomach
should not be taken with calcium supplements.
Combination Products
Calcium supplements are available in a dazzling array of
combinations with vitamins and other minerals. While vitamin D is
necessary for the absorption of calcium, it is not necessary that
it be in the calcium supplement (see winter 1998 issue of
Osteoporosis Report for information on vitamin D). Minerals such
as magnesium and phosphorus also are important, but usually are
obtained through food or multivitamins. Most experts recommend
that nutrients come from a balanced diet, with multivitamins used
to supplement dietary deficiencies.
Most published studies show that low calcium intake is associated
with low bone mass, rapid bone loss and high fracture rates.
Adequate calcium intake will help ensure that calcium deficiency
is not contributing to a weakening of the skeleton; however, this
is only one of the steps necessary for bone health. A high calcium
intake will not protect a person against bone loss caused by
estrogen deficiency, physical inactivity, smoking, alcohol abuse
or various medical disorders or treatments.
Top
Calcium Supplements
Compared
Calcium Carbonate:
Calcium carbonate is 40% calcium. The rest is carbonate. Of that
40% calcium only about 2% is small enough to be used by the body.
Calcium Citrate:
Calcium Citrate is a chelated mineral. It is basically calcium
wrapped with a covering derived from citric acid. Calcium citrate
is 21% calcium. Because of the chelation it is better absorbed
than calcium carbonate.
Calcium Lactate:
Calcium Lactate is 14% calcium. About 10% of that is usable. It is
the calcium found in dairy products. Infants and small children
are able to digest lactose (milk sugar); adults cannot. When
lactate remains undigested, the complex calcium lactate molecule
does not get broken apart in the body. It remains in large
molecules, most of them too big to enter the body's cells.
Calcium Gluconate:
This is calcium combined with glucose or blood sugar. This form of
calcium is superior to calcium lactate but it is only 9.3%
calcium.
Calcium Phosphate:
Calcium phosphate is 8% calcium and 92% phosphate.
Calcium Acetate:
Calcium acetate is 23% calcium.
**************************
Metallic Minerals:
Some examples of metallic calcium are eggshell, oyster shell,
calcium carbonate, dolomite, calcium salts and certain antacids
such as Rolaids and Tums. The bioavailability (usability) of
metallic minerals is approximately 8-12% in young people. After
the age of 35-40 years, usability within the human body drops to
3-5%.
Chelated Minerals:
Chelated minerals are better. During the chelation process an
enzyme, protein or amino acid gets wrapped around a mineral. When
a cell is in need of one of those nutrients, the mineral wrapped
in that nutrient is taken into the cell. The outer coating gets
digested and guess what! There was a mineral hidden in the center!
The body was tricked but our goal was achieved; the mineral was
taken into the cell. Chelation sometimes increases the
bioavailability to 30 or 40%. The usable portion still remains a
small percentage of the total intake.
What Happens When Minerals Are Not Usable At The Cellular
Level?
Some large minerals will simply move through the digestive tract
and exit the body. Nothing is gained and nothing is lost except
the cost of purchase. At other times the consequences are much
more serious. Certain minerals tend to build up in the body and
become toxic. Calcium is one of them.
When the calcium supplied through dietary intake is too large to
go into the cells, some of it gets lodged between cells. That
leads to calcium deposits associated with certain types of
arthritis. Sometimes it shows up as kidney stones. Other large
calcium molecules float around in the blood ready to become plaque
inside the arteries.
Unusable calcium is also responsible for a number of other disease
conditions.
Large calcium molecules cannot be used at the cellular level;
therefore they cannot meet the body's requirement for calcium.
When there is an immediate need, the body is forced to take usable
calcium out of its storage area (our bones). Osteoporosis may
develop.
It is possible to have toxicity from too much unusable calcium in
the body. At the same time the body may have a calcium deficiency
because there is not enough calcium that is usable. Understanding
this concept is extremely important.
Warning about Natural Source Calcium Supplements
Natural sources of calcium such as oyster shell, bone meal and
dolomite have recently raised some health concerns. The Natural
Resources Defense Council has issued a press release stating that
some dietary calcium supplements randomly tested contained
unacceptable levels of lead. Some of these also had aluminum,
arsenic, mercury, and cadmium. All these contaminants are highly
toxic.
Water Soluble Calcium by Reality Health Research
Ingredients: Pure distilled water, pure elemental calcium and pure
elemental magnesium.
These minerals are in a form ready for immediate use. The minerals
are small enough to enter cells. Distilled water does not have to
be broken down by the body. Therefore this mineral supplement is
instantly absorbed. Bioavailability is 100%. One tablespoon of
Water Soluble Calcium provides 10 times the amount of usable
calcium as does 1,000 milligrams calcium carbonate.
When we take calcium in a usable form, the first thing that
happens is the calcium goes for immediate use where it is most
needed at the moment. That probably means it goes for use by the
cells. After the cells have been satisfied, then the extra calcium
goes into bone storage. Low bone density starts increasing. Once
the storage area is filled, then the body no longer needs to store
the larger calcium and starts releasing it. Calcium deposits
gradually diminish and so does
the pain associated with them.
© HealthCatchers 1999-2000. All rights reserved.
****************************
Eating well: All calcium pills are not created
equal
12/28/99 By Pat Baird
FOR THE STAR-LEDGER
Just about everyone knows that dairy products are the best dietary
form of calcium. Few people, however, understand that some forms
of calcium supplements are absorbed differently than others.
A new study reporting results on this concept may impact consumer
choice. Published in the November issue of The Journal of Clinical
Pharmacology, the research demonstrated that the formulation of
calcium citrate is 2.5 times more bioavailable than calcium
carbonate.
This challenges the misperception that all calcium supplements are
equal.
"Adequate calcium intake is important throughout one's lifetime,"
says Dr. Maria A. Rodino of Endocrine Associates in Ridgewood. "It
is a major determinant of peak bone mass beginning in early
childhood and helps retard bone loss throughout adulthood." In
addition, calcium performs a number of functions in the body: It
is required for the production of hormones; muscle contractions;
transmission of nerve impulses, and appears to have a role in
regulating blood pressure.
The latest study, coordinated by Dr. Howard J. Heller, assistant
professor, Center for Mineral Metabolism and Clinical Research at
the University of Texas Southwest Medical Center in Dallas,
compared the calcium absorption of calcium carbonate (Os-Cal), and
ultradense calcium citrate (Citracal). Results showed that the
cumulative increment in serum calcium concentration was 2.5-fold
greater with calcium citrate than calcium carbonate, meaning that
the citrate form was much better absorbed than the calcium
carbonate.
"Although calcium carbonate supplements contain more elemental
calcium per pill than calcium citrate, this study confirmed that
they are not as readily available to the body overall," explains
Heller. (Elemental calcium is the amount of raw calcium a
supplement contains; while it is an accurate measure of how much a
given supplement contains before it is taken, bioavailability is a
measure of how much usable calcium can be absorbed by the body.)
He also notes that similar favourable results with calcium citrate
have been found at other research centers such as The Mayo Clinic,
and the University of Connecticut.
Calcium carbonate is the formulation found in many common antacids
and calcium supplements. It has the highest concentration of
calcium by weight, but it is relatively insoluble in a low acid
situation, and poorly absorbed when taken on an empty stomach.
Calcium citrate (as found in Citracal) is highly soluble, and
extremely well absorbed by the body whether taken with or without
a meal. It also raises urinary citrate -- which is a well-known
inhibitor of stone formation -- thereby reducing the risk of
kidney stones. Calcium phosphate is a formulation that is less
soluble than citrate, and is frequently used for generic calcium
supplements
The National Institutes of Health recommends a daily calcium
intake of 800 to 1,500 milligrams for children and young adults;
1,000 milligrams for adults to age 64, or 1,500 milligrams for
postmenopausal women not on estrogen replacement therapy, and
adults over the age of 65. That translates into three to four
servings of dairy products each day -- more than most Americans
are prone to eat. Canned salmon (with soft bones and can juices),
broccoli, beans, and calcium-fortified foods like orange juice,
and breakfast cereals are other options.
"Because the average American diet provides insufficient calcium .
. . supplementation is generally necessary," says Rodino, "and
finding the best form of calcium can be a challenge to both the
physician and patient." With studies such as Heller's, this
challenge may be diminishing.
Top
Iron
Iron, a trace mineral, prevents
anemia and keeps your red blood cells healthy. In fact iron is an
essential part of hemoglobin, a part of the red blood cells that
carries oxygen throughout your body. You also store iron in your
muscle tissues and it's an essential part of many of your body's
proteins and enzymes.
How Much Iron Is Enough?
The recommended dietary allowance (RDA) for iron is:
-
10 milligrams a day - Men age 19 and
older and women age 51 and older who are not menstruating
-
15 milligrams a day - Women age 19 to
50 who are menstruating
-
30 milligrams a day - Pregnant women
-
15 milligrams a day - Breastfeeding
women
Good Sources of Iron
-
Animal liver, kidney and heart
-
Oysters
-
Iron-fortified bread and cereal
-
Lean red meat
-
Nuts
-
Egg yolks
-
Dried beans and legumes
-
Blackstrap molasses
-
Dried fruit
-
Dark leafy green vegetables
-
Foods cooked in an iron skillet
Animal products provide heme iron,
which is more easily absorbed than non-heme iron, the type of iron
available from plant sources.
When you're eating iron-rich foods, avoid drinking black or pekoe
teas, which can inhibit your body's absorption. Try to eat foods
containing vitamin C (such as oranges or grapefruit) with iron
sources to enhance your body's rate of absorption.
Can You Have Too Much or Too Little?
Iron deficiency, which is the most common nutritional deficiency,
can cause anemia, which prevents your body's cells from getting
enough oxygen. Symptoms of iron-deficiency anemia include
weakness, headache, dizziness, drowsiness, fatigue and
irritability. Teen girls and women who are menstruating and
children and adolescents undergoing rapid growth periods are
especially at risk for iron deficiency and iron-deficiency anemia.
Infants and children are also at increased risk of iron
deficiency.
In some people iron can build up to toxic levels in the body.
Studies show that too much iron can lead to increased risk of
coronary heart disease and some cancers. You should never take
iron supplements without consulting your physician. Symptoms of
iron toxicity are fatigue, anorexia, dizziness, nausea, vomiting,
headache, weight loss, shortness of breath and possibly a grayish
color to the skin. If you do take iron supplements, be sure to
keep them in a locked cabinet where your children can't reach
them. Ingestion of iron supplements by children can cause iron
toxicity, which may be fatal.
Taking more minerals than you need won't make you healthier. In
some cases taking too much of a mineral can make it hard for your
body to absorb other vitamins. But you don't want to be deficient
in minerals, either. You can avoid vitamin and mineral
deficiencies by eating a wide variety of fruits, vegetables,
protein sources, whole grains and dairy products every day.
Top
Potassium
Potassium, a trace mineral, balances
water and acid in the blood and body tissues. Potassium is also
important for building muscle and metabolizing protein and
carbohydrate.
How Much Potassium Is Enough?
Although there is no recommended daily allowance (RDA) for
potassium, the National Library of Medicine suggests that
consuming 2 to 2.5 grams of potassium a day is adequate. Most
Americans consume between 2 and 6 grams of potassium each day.
People with high blood pressure are often treated with a diet
that's high in potassium but low in sodium called the DASH diet.
Good Sources of Potassium
Good sources of potassium include:
-
Fish, such as salmon, flounder, cod
and sardines
-
Meat, such as beef and chicken
-
Peas
-
Lima beans
-
Tomatoes
-
Potatoes (especially their skins)
-
Leafy green vegetables
-
Citrus fruits
-
Bananas
-
Apricots
-
Melon
-
Dried fruit
-
Nuts
-
Chocolate
Can You Have Too Much or Too
Little?
People with chronic diseases or seniors may experience hypokalemia,
or potassium deficiency. Potassium depletion may also be caused by
vomiting, diarrhea or use of diuretic or cortisone medications.
Symptoms of potassium deficiency include fatigue, slow reflexes,
muscle weakness and dry skin. If potassium levels are depleted
quickly, a person could experience heart problems. If potassium
levels are not replenished quickly, a person could suffer heart
failure and even death.
Too much potassium can lead to hyperkalemia, or increased
potassium levels in the blood. People with kidney problems or
severe infection may suffer from increased potassium levels.
Taking more minerals than you need won't make you healthier. In
some cases, taking too much of a mineral can make it hard for your
body to absorb other vitamins. But you don’t want to be deficient
in minerals, either. You can avoid vitamin and mineral
deficiencies by eating a wide variety of fruits, vegetables,
protein sources, whole grains and dairy products every day.
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Selenium
Selenium is a trace mineral, and the
body only needs small amounts of it to function properly. Selenium
plays an important role in the body's enzyme function, and may
help to stimulate the production of antibodies (disease-fighting
organisms) after vaccination. Selenium also aids in male
fertility.
Selenium is also considered an antioxidant, and it may work with
other antioxidants such as vitamins C and E to protect the body's
cells against free radicals, which can promote the development of
cancer and heart disease.
How Much Selenium Is Enough?
Men and women should consume 50 to 200 micrograms of selenium a
day. Selenium is often an ingredient included in commercial
multivitamin supplements. The typical American diet provides
adequate amounts of selenium.
Good Sources of Selenium
Good sources of selenium from foods include:
Can You Have Too Much or Too
Little?
People who are fed intravenously for long periods of time may
experience selenium deficiencies, but generally the American diet
provides adequate amounts of selenium, and selenium deficiencies
are rare. Selenium toxicity is also rare, but may cause tooth,
nail and hair loss, as well as skin inflammation.
Taking more minerals than you need won't make you healthier. In
some cases, taking too much of a mineral can make it hard for your
body to absorb other vitamins. But you don't want to be deficient
in minerals, either. You can avoid vitamin and mineral
deficiencies by eating a wide variety of fruits, vegetables,
protein sources, whole grains and dairy products every day.
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Sodium
Sodium, a macromineral, is actually necessary to regulate your
blood pressure and blood volume. Without sodium, you wouldn't have
any blood pressure at all. Sodium occurs naturally in many foods,
including vegetables and dairy products. In addition, sodium is in
drinking water and in many processed foods and condiments, such as
soy sauce, processed meats, and canned soups and vegetables.
The problem with sodium is that Americans are consuming way too
much of it-between 4,000 and 6,000 extra milligrams per day. Table
salt is 40% sodium, and one teaspoon of salt contains 2,300
milligrams of sodium. Sodium can be a major dietary culprit when
it comes to high blood pressure, so it’s important to monitor your
sodium intake.
How Much Sodium Is Enough?
The American Heart Association recommends that for every 1,000
calories of food you eat, the sodium intake should be 1,000
milligrams or less and should not exceed the 3,300 milligram daily
limit for adults.
However, your sodium intake may be dependent upon your medical
condition and the prescriptions you take. People who have
hypertension may be advised by their doctors to consume a
low-sodium diet.
The sodium content of most foods is listed on the food label. In
general, fast foods, processed meats and canned vegetables and
soups contain lots of added sodium.
Limiting Sodium
Processed food often contains a lot of sodium. Watch out for dried
sauce mixes, boxed dinners, and snack foods like potato chips and
pretzels. Try these tips to reduce the sodium in your diet:
-
Remove the salt shaker from the table.
-
Choose fresh, frozen or canned food items without added salts.
-
Select unsalted nuts or seeds, dried beans, peas and lentils.
-
Avoid adding salt and canned vegetables to homemade dishes.
-
Select unsalted, fat-free broths, bouillons or soups.
-
When dining out, be specific about what you want and how you want
it prepared. Request your dish to be prepared without salt.
-
Learn to use spices and herbs to enhance the taste of your food
instead of salt.
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Zinc
Zinc, a trace mineral, is important
to maintain your body's immune system functioning. Zinc also aids
in cell growth and cell division and helps with wound healing.
Zinc is also integral to your ability to taste and smell.
How Much Zinc Is Enough?
Recommended daily allowances (RDAs) for zinc are:
-
15 milligrams per day - Men over 11
years
-
12 milligrams per day - Women 11 to
50 years
-
15 milligrams per day - Women over 50
years
-
19 milligrams per day - Pregnant and
breastfeeding women
Good Sources of Zinc
In general, high-protein foods, such as the following, are good
sources of zinc:
-
Beef, pork and lamb
-
Dark meat of chicken
-
Fish and shellfish (especially
oysters)
-
Dairy products
-
Peanuts and peanut butter
-
Legumes
-
Fruits and vegetables are not
generally good sources of zinc.
Can You Have Too Much or Too
Little?
People who eat vegetarian or low-protein diets may have low zinc
intakes, which can lead to zinc deficiency. Symptoms of zinc
deficiency include slow growth, poor appetite, impaired smell and
taste and hair loss.
If you take too much zinc, you may experience zinc toxicity, which
usually results in abdominal cramping, diarrhea and vomiting.
Taking more minerals than you need won't make you healthier. In
some cases, taking too much of a mineral can make it hard for your
body to absorb other vitamins. But you don't want to be deficient
in minerals, either. You can avoid vitamin and mineral
deficiencies by eating a wide variety of fruits, vegetables,
protein sources, whole grains and dairy products every day.
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NUTRIENTS
Carbohydrates
Carbohydrate-rich foods are the
primary source of energy for all body functions. Your body breaks
down carbohydrates, or carbs, into fuel for use by your cells and
muscles - that's why eating a moderate amount of carbohydrates is
necessary for most people. There are two types of carbs - sugars
and starches. Sugars are simple carbohydrates that can be easily
digested by your body and include foods like cake, soda, candy,
jellies and fruits. Starches are complex carbohydrates that take
longer to be digested and include foods such as breads, grains,
pasta, tortillas, noodles, fruits and vegetables.
Many carbohydrate-rich foods are loaded with other nutrients.
Fruits and vegetables are not only great carbohydrate sources,
they’re also excellent suppliers of vitamins A and C and many
other vitamins and minerals. Most dairy products are also great
sources of carbohydrates.
Some foods rich in carbohydrates have fewer nutrients. Some foods
rich in carbohydrates have fewer nutrients. Foods made from sugar
(white, brown, powdered and raw) as well as corn syrup, honey and
molasses are simple carbohydrates that provide little to the diet
except extra calories, and too many extra calories in the diet can
lead to excess body fat. Use the top layer of the Food Guide
Pyramid as your guide, and limit your consumption of sugary foods
- even if they do contain carbohydrates.
Quality Carbohydrate Choices
Do most of the carbs in your diet come from cookies, cakes and
sugary foods? You don't necessarily need to cut back on the number
of carbohydrates you eat, but you should try to eat foods that
provide your body with more nutrients and less fat and sugar. Here
are a few tips for making better carbohydrate choices:
If you eat white bread, switch to bread made with stone ground
whole-wheat flour. You can use it for sandwiches or French toast
or you can grind it into breadcrumbs.
If you like to snack on crackers that are high in fat and sodium,
switch to whole-wheat crackers. For example, Triscuits are made
with whole wheat, and come in reduced-fat and low-sodium
varieties.
Drinking milk is a great way to load up on quality carbs, but
whole milk has a high fat content. Choose 1%, skim or skim milk
fortified with calcium instead. Begin weaning yourself off whole
milk by using skim for cooking and baking first before using it on
cereal.
Learn how to use sugar and oil replacements in your cooking.
Instead of oil, use applesauce or pureed prunes in muffins and
cakes. Instead of sugar, Splenda and stevia are sweet-tasting
replacers that can be used to prepare your food and drinks.
How Many Carbohydrates Should I Eat?
Most medical experts say that 60 percent of the calories you eat
every day should come from carbohydrates. To find out how many
carbohydrates you need, multiply the number of calories you need
by .6. For example, if you need 2,000 calories per day, 2,000
multiplied by .6 = 1,200. So you know you need 1,200 calories from
carbohydrates. There are 4 calories in a gram of carbohydrate.
Take your 1,200 calories and divide by 4 = 300 grams. Knowing the
calories and the carbohydrate grams you need will help you when
you’re reading a food label.
Focus on Fiber
Fiber is an important kind of carbohydrate that comes only from
plant-based foods such as fruits, vegetables and grains.
The two types of fiber are soluble and non-soluble. Soluble fiber
helps control blood sugar and may also lower cholesterol.
Non-soluble fiber doesn't appear to lower blood sugar or
cholesterol but may help reduce the risk of colon cancer. It also
helps maintain bowel function.
When choosing packaged breads, grains and cereals, use food labels
to determine how much fiber a food contains. The fiber content of
manufactured foods is listed on the Nutrition Facts label.
Adults need between 20 and 35 grams of fiber every day, according
to the American Dietetic Association (ADA). The organization
reports that Americans currently are only eating between 12 and 17
grams a day.
Good sources of soluble fiber include:
Good sources of non-soluble fiber
include:
Carbohydrate Counting for People
With Diabetes
The three main nutrients--protein, carbohydrate and fat--affect
blood sugar differently. Because carbohydrates contain both sugar
and starch, they have the biggest impact on blood sugar. All of
the carbohydrate you eat gets changed into blood glucose within
five minutes to three hours after the food is eaten. For people
with diabetes, knowing carbohydrates' effect on blood sugar is
important for good health.
How much carbohydrate you eat (whether it's sugar or starch) will
determine your blood sugar level after a meal or a snack, so
keeping track of your carbohydrate intake is important. Many
people with diabetes have maintained good blood sugar control with
a technique called carbohydrate counting. Carbohydrate counting
not only contributes to better blood sugar control, it also
provides more variety in food choices.
There are two ways to count carbs: the simple way and the more
advanced method. With the simple method, you work with a certified
diabetes educator/registered dietitian to figure out how many
grams of carbohydrate to eat at your meals and snacks. For
example, if your nutritionist estimates that you need 75 grams of
carbohydrates for breakfast each day you have the information you
need to vary your food choices. A breakfast of cereal, milk,
yogurt and blueberries will add up to 72 grams. But you might
choose a breakfast of bagel, low-sugar jelly and non-fat milk for
a total of 78 grams.
The advanced method of carbohydrate counting involves matching
your insulin dose to the amount of carbohydrate you eat. You will
need to work with professional diabetes educators to determine
your ratio of carbohydrate to insulin. In both types of
carbohydrate counting, however, knowing serving sizes and reading
food labels are both necessary in order to count carbohydrates.
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Fat
Fat is the body’s major energy
storage system. When the energy from the food you eat and drink
can’t be used by your body, the body may turn it into fat for
later use. Your body uses fat from foods for energy, to cushion
organs and bones, and to make hormones and regulate blood
pressure. Some fat is also necessary to maintain healthy skin,
hair and nails, so you shouldn’t cut all fat out of your diet. But
in general, most people in the United States consume too much fat
– which can lead to heart disease, obesity, diabetes and many
other health problems.
Types of Fats
Not all fats are created equal. Saturated fats, which are
generally solid at room temperature, are the least healthy and
tend to increase the level of cholesterol in your blood. Foods
that contain saturated fat include butter, cheese, some
margarines, shortening, tropical oils such as coconut and palm oil
and the fats in meat and poultry skin, so you should try to limit
your consumption of those oils and foods.
Unsaturated fats reduce blood cholesterol when they replace
saturated fats in the diet. There are two types of unsaturated fat
- monounsaturated fat and polyunsaturated fat. Monounsaturated
fats have been shown to raise the level of HDL, the 'good'
cholesterol that protects against heart attacks, in the blood, so
in moderation they can be part of a healthy diet. Olive and canola
oils, peanut butter and nuts are particularly high in
monounsaturated fats. The American Heart Association (AHA)
recommends that you limit calories from monounsaturated fat to no
more than 15% of your total calorie intake.
Although polyunsaturated fats come from plants and fish, but they
may be more likely to form free radicals and lead to tissue
damage. Good sources of polyunsaturated fats include most other
vegetable oils and high-fat fish such as salmon and tuna. The AHA
also recommends that saturated and polyunsaturated fats should
make up less than 10 percent of your calorie intake.
Partially hydrogenated vegetable oils, such as those used in many
margarines and shortenings, contain unsaturated fats called
trans-fatty acids. Trans-fatty acids may raise blood cholesterol
levels, although not as much as saturated fat.
How Much Fat Should I Eat?
The American Heart Association and the United States
Department of Agriculture
recommend that you limit your fat intake to no more than 30% of your daily
calories. Of that 30%, 10% or less of the fat calories should come
from saturated fat. Check the Nutrition Facts labels of the foods
you eat for information about fat from saturated and unsaturated
sources.
It's hard to visualize a gram of fat (which contains 9 calories),
but it's easier to visualize a teaspoon of fat. Each teaspoon of
fat contains about 4 grams. Here's a list of common foods and the
fat you can expect to find in them.

Adjusting Fat Intake for Weight Loss or Gain
If you want to lose body fat, limit your intake of high-fat foods.
This will not only improve your metabolism, it will allow you more
food for your calorie expenditure because fats have more than
twice the calories per gram as proteins (which contain 4 calories
per gram) and carbohydrates (also 4 calories per gram).

But just because a food is low in fat doesn't mean you can eat all
you want and not gain weight. Low-fat and no-fat foods still
contain calories, so it's possible to gain weight from eating too
many low-fat foods. Keep your serving sizes and calories under
control while monitoring your fat intake, and you’ll be better
able to manage your weight. It's also a good idea to choose foods
for their nutrient content - not just fat-free or low-fat versions
of low-nutrient foods such as cookies, cakes and candy. Fruits,
vegetables and whole grains contain plenty of vitamins and
minerals, while being naturally low in fat.
To use up your body's fat storage, you need to exercise regularly.
Moderate aerobic exercise, which raises your heart rate, is
especially important. And any exercise that builds muscle mass can
also help you burn more calories because muscle burns more
calories than fat.
If you're trying to gain weight, you may want to add more
high-calorie, high-fat foods. But try to limit the saturated fats
in your diet. Exercise is also important because it will help to
ensure that the weight you gain is more muscle and less fat.


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Protein
Along with carbohydrates and fat,
your body needs protein, a nutrient made up of essential and
nonessential amino acids, for good health. Your body manufactures
13 nonessential amino acids, which aren't available from food. For
the body to process protein properly, the foods that you eat must
contain the nine essential amino acids that are available only
from dietary sources.
How does your body use protein from food? Protein helps to
maintain and replace the tissues in your body, and it’s found in
almost every living cell and fluid. Your muscles, organs and many
of your hormones are made up of protein, and it is also used in
the manufacture of hemoglobin, the red blood cells that carry
oxygen to your body. Protein is also used to manufacture
antibodies that fight infection and disease and is integral to
your body's blood clotting ability. Both children and adults need
plenty of protein to grow and develop.
Good Sources of Protein
Good low- or nonfat sources of protein include:
-
Beef, poultry, pork and lamb
-
Fish and shellfish
-
Dairy products, including cottage
cheese, cheese, yogurt and milk
-
Eggs, egg whites or egg substitutes
-
Dry beans, peas, oats and legumes
-
Tofu and soy products
-
Nuts and seeds
Proteins are considered either
complete proteins (which supply enough essential amino acids) or
incomplete proteins (which lack adequate essential amino acids).
Meat, eggs and dairy products are considered complete proteins,
but vegetables, beans and other plant products are considered
incomplete proteins. However, some incomplete proteins can be
combined to create a complete protein - rice and beans, peanut
butter and jelly, and corn and beans are examples of
complete-protein meals.
How Much Protein Do I Need?
Your protein intake will be dependent upon your age, your
medical condition, your activity level and your size. The Food
Guide Pyramid recommends that for most adults, two to three
servings of protein a day is adequate.
Some common serving sizes of protein include:
-
3 to 4 ounces of cooked lean meat,
poultry and fish (a portion about the size of a deck of playing
cards)
-
1/2 cup of cooked dry beans, lentils
or legumes
-
1 egg or 2 tablespoons of peanut
butter, which count as 1 ounce of lean meat
If you eat a diet low in fat, choose
low-fat protein portions such as fish, shellfish, beans, egg
substitutes and nonfat milk products.
The Role of Protein in Special Diets
Although many good sources of protein
are found in meat or animal products, vegetarians can still
consume adequate amounts of protein. Vegetarians who eat dairy
products and eggs can still choose from a variety of plant and
animal protein sources. Vegans who eat only plant sources of food
can still rely on tofu, soy products, oats, beans, lentils and
peanut butter for protein.
People who eat too much protein may be at risk for high
cholesterol or gout, a joint disorder. High-protein diets, such as
the Atkins Diet and Protein Power, have also been implicated in
kidney problems because of the extra effort the body must expend
to process large amounts of protein. High-protein diets may also
be high in fat and may lead to heart disease, according to the
American Heart Association.
If you are concerned that you aren't getting enough protein in
your diet, consult your physician or a registered dietitian for
dietary help.

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Sugar
Sugar is a simple carbohydrate. There
are two types of sugars - monosaccharides, which include glucose,
fructose and galactose, are made of one sugar molecule, and
disaccharides are made of two sugar molecules linked together.
Disaccharides are formed when monosaccharides combine - for
example, when glucose and fructose are combined, they form
sucrose, also known as table sugar. Other disaccharides include
maltose, dextrose and lactose. When many sugar molecules are
linked together, they form a complex carbohydrate, also known as a
starch.
Sugar provides the sweet flavor to foods to which it has been
added, and it may also act as a preservative and flavor enhancer.
Sugar is used in a variety of foods, including cookies, cakes,
pickles, ice cream, alcohol and jams and jellies. Types of sugar
include raw sugar, brown sugar, honey, molasses, maple sugar and
corn syrup.
Sugar, which provides 16 calories per teaspoon, provides no
vitamins and minerals, so it's a good idea to use it in
moderation. Overconsumption of sugar, like other carbohydrates,
has been linked to the development of cavities. However, sugar
consumption has not been linked to hyperactivity in children. A
high intake of sugar does not cause diabetes, but if a person is
diagnosed with diabetes the amount of simple sugar eaten daily
often needs to be reduced.
Artificial Sweeteners
Two types of sweeteners—sugar alcohols and no-calorie
sweeteners—are used to replace sugars in foods. It's not necessary
to use artificial sweeteners to eat less sugar because foods taste
just fine made with less sugar. Still, artificially sweetened
beverages, yogurt and desserts are a popular alternative to sugary
treats.
No-calorie sweeteners currently used in foods include saccharin,
aspartame and acesulfame-K. Saccharin is about 300 times sweeter
than table sugar (sucrose). It's used in several brands of
table-top sweeteners, in canned foods and in low-calorie soft
drinks.
Aspartame is 160 to 220 times sweeter than table sugar. Aspartame
loses flavor in foods when heated. Although aspartame contains 4
calories per gram, the amount used is minute, so aspartame
generally adds less than 1 calorie to a product per serving.
Products that may contain aspartame include low-calorie beverages,
sugar-free gelatins, yogurt, puddings, frozen desserts and
cereals, as well as table-top sweeteners. Table-top sweeteners may
contain an ingredient used as a filler that provides some
calories. People with the condition phenylketonuria should not
consume aspartame because their bodies are unable to metabolize
it.
Acesulfame-K is 200 times sweeter than sugar. This newest of
artificial sweeteners is being used in dry mixes for beverages,
gelatin desserts, and puddings.
Artificial sweeteners must be approved by the Food and Drug
Administration (FDA) for use in foods or as a table-top sweetener
before they can be used by food processors or marketed for sale.
Ingredient labels list any artificial sweeteners in a product.
Using Less Sugar and Sweeteners
Here are some tips for reducing sugar in your diet to make
room for more nutritious foods:
-
Read ingredient labels. If sugar is
listed as the first, second or third ingredient, the product
probably contains a large amount of sugar as a sweetener. Identify
all the sugars in a product (sucrose, honey, glucose, molasses,
dextrose, corn sweetener, fructose, high-fructose corn syrup,
lactose, maltose, sorghum syrup, mannitol, fruit juice
concentrate, sorbitol).
-
Select items lower in added sugars
when possible.
-
Buy fresh fruits or fruits packed in
water, juice, or light syrup rather than those in heavy syrup.
-
Buy fewer foods that are high in
sugars such as soft drinks, fruit-flavored punches and sweet
desserts. Be aware that some low-fat desserts may be very high in
sugar.
-
Add less sugar to coffee, tea, cereal
or fruit. Get used to half as much, then see if you can cut back
even more.
-
Use less sugar in the foods you
prepare at home. Try new recipes or adjust your own. Start by
reducing sugars gradually until you've decreased them by one third
or more.
-
As you reduce the sugar in your baked
goods, try adding spices like cinnamon, cardamom, coriander,
nutmeg, ginger and mace to enhance the sweet flavor of foods.
Spiced foods will taste sweeter if warmed.
Here's a guide for baking with less
sugar:
| For every cup
of flour, |
use only: |
| Cakes and
cookies |
1/2 cup
sugar |
| Muffins and
quick breads |
1
tablespoon sugar |
| Yeast breads |
1 teaspoon
sugar |
Reducing your sugar intake will help
you cut calories and will allow you more room for more nutritious
foods.
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