Popular Conclusions:
Summary
Vitamin A is a fat-soluble antioxidant stored primarily in the liver,
but also in kidneys, lungs, gonads, and adrenals, from where it is released
when needed. Zinc is required for the liver to move vitamin A out of its
storage depots. Vitamin A and beta carotene are involved in cell growth,
vision, protection against free-radicals damage to the lung and mucous
membranes, the production of healthy sperm, and the maintenance of a properly
functioning thyroid gland, retards development of cancer in epithelial
tissues (including the most common types, skin and lung) and other functions.
Vitamin A also helps regulate the synthesis of sex hormone progesteron.
Vitamin A is found in two forms, performed vitamin A and pro-vitamin A,
or beta-caro- tene. Carotene is a pigment found in vegetables...Each molecule
of beta carotene is converted to two molecules of vitamin A in the body
on demand. So it is relatively nontoxic, even when taken in large amounts.
Vitamin A is a powerful immune system stimulant, which increases the size
of the thymus gland (the muster gland of the immune system) and boots its
functional capacity.Vitamin A can also improve the appearance of your skin
and help protect you from viral and bacterial disease. Adequate vit A can
apparently prevent some serious birth defects, such as spina bifida.Vitamin
A is required for vision, as part of photosensitive pigments. Inadequate
this vitamin leads initially to the reduced visual dark adaptation and
eventually to retinal degeneration and blindness.
Sourses:
Robert Haas "Eat Smart
Think Smart"
Dunk Pearson and Sandy Show "Life Extension"
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