|
Every
cell in the body relies on a sufficient supply of vitamins to do
its metabolic work. In this way, vitamins perform many functions.
Among other things, they promote blood formation and healthy skin,
hair and vision; they help to maintain nerves and muscles; and they
aid in the release of energy from foods. Recent research suggests
that some vitamins can even help prevent certain disorders, such
as cancer, cataracts, arthritis and heart disease. Most vitamins
must be obtained from foods or supplements because the body cannot
produce them. Vitamin deficiencies are common to many groups of
people: dieters, pregnant or nursing women; the elderly; people
under stress; and those taking medications, such as cortisone or
antibiotics. Plus, cigarettes, coffee, alcohol and birth control
pills all rob the body of vitamins. The first signs of a vitamin
deficiency are fatigue, irritability and anxiety. Over time, the
immune system will weaken.
Preserving
vitamins
Over cooking,
light, air and long storage diminish the vitamin content of fruits
and vegetables. To minimize vitamin loss:
- Buy locally
grown produce
- Choose frozen
fruits and vegetables over canned; they're more nutritious
- Wash and
cut produce just before serving; don't buy precut fruits and vegetables
- Select organic
fruit, and eat the skins of pears and apples
- Steam fresh
vegetables rather than boiling them.
Important
vitamins
- Pantothenic
acids for the brain
- Vitamin D
for the bones
- Vitamin B12
for the blood
- Vitamin A
for the heart and circulation
- Thiamin for
the muscles
Excessive
coffee drinking can lead to vitamin deficiency
What
you can do
There is no substitute for a healthy diet of fruits, vegetables,
grains and legumes. Vitamin deficiency usually occurs only after
many weeks or months of intake below recommended levels. Supplements
that supply megadoses of vitamins may provide an overdose.
The fat soluble
vitamins
Fat soluble
vitamins are stored in the body for use as needed. To increase their
absorption, cook with olive oil.
| Vitamin |
Functions |
RDI |
Supplied
by |
| A |
Healthy
skin; heart |
5000
IU |
1
medium carrot |
| D |
Bone
formation |
300
IU |
3
½ oz. avocado |
| E |
Cell
protection |
30
IU |
1
tbsp; wheat germ oil |
| K |
Blood
circulation |
80
mcg. |
¼
cup parsley |
The water
soluble vitamins
The following
water soluble vitamins are not stored by the body. Therefore, you
must strive to meet daily recommendations.
| Vitamin |
Functions |
RDI |
Supplied
by |
| B6 |
Strengthens
nerves |
2
mg |
2
large bananas |
| B12 |
For
red blood cells |
3
mg |
3
½ oz. salmon |
| C |
For
immune system, wound healing, cell protection |
60
mg |
2
cups fresh raspberries |
| Folic
Acid |
For
cell formation, fights heart disease, birth defects |
450
mg. |
2
cups asparagus |
| Niacin |
For
energy metabolism |
20
mg. |
5
oz. chicken breast |
| Pantothenic
acid |
For
the central nervous system |
10
mg. |
10
cups skim milk |
| Riboflavin |
Fights
fatigue |
1.7
mg. |
3
cups nonfat yogurt |
| Thiamin |
Strengthens
muscles, heart, nerves |
1.5
mg. |
5
oz. pork loin |
The Recommended
Daily Intakes (RDI) are the values that are the basis for the nutritional
requirement listed on food labels.
Extra
Tip : Cigarette smokes destroys
vitamin C in the body, so smokers need 100 mg. a day. A cup of orange
juice supplies this amount.
Vitamin Rich
cocktails
Raw fruits and vegetables are the best sources of vitamins, and
drinking fresh juices made from tem is a delicious way to take advantage
of their nutritional power. Use a juicer to make the following fruit
and vegetable cocktails.
To boost
the immune system
2 carrots, ½ lemon, 1 stalk celery, ½ red beet, 1
handful wheatgrass
To guard
against cancer
3 carrots, ½ apple, 1 handful broccoli florets
To renew
cells and fight the aging processes
3 carrots, 1 handful spinach, 1 orange, 1 tsp. olive oil
To improve
vision
1 apple, 1 kiwifruit, 1 handful mache, 1 tsp. olive oil
Multivitamin
Preparation
Although it is not a substitute for a healthy diet, a multivitamin
that supplies no more than the reference Daily for each nutrient
can provide extra insurance. Except for vitamin E, which may be
safely taken in dosages upto 400 IU by people not using anticoagulant
drugs, taking supplements of individual vitamins is generally not
a good idea, because sometimes very high doses are harmful.
Antioxidant
power
Beta-carotene (found in dark green vegetables and orange fruits
and vegetables), vitamin C ( found in citrus fruits and broccoli)
and vitamin E (found in nuts, vegetable oil and dark leafy greens)
are all natural antioxidants. These substances help neutralize free
radicals, which in turn help prevent accelerated aging and fight
disease, such as cancer and heart disease.
|