Vitamin B3 - Niacin
Niacin, also known as nicotinic acid and vitamin B3, also works as a coenzyme in
the
release of energy from nutrients. A deficiency of niacin causes pellagra, the first symptom of which is a sunburnlike eruption that breaks out where the skin is exposed to sunlight.
Later symptoms are a red and swollen tongue, diarrhea, mental confusion, irritability, and, when the central nervous system is affected,
depression and mental disturbances. The best sources of niacin are liver, poultry, meat,canned tuna and salmon, whole grain and enriched
cereals, dried beans and peas, and nuts. The body also makes niacin from the amino acid tryptophan. Megadoses of niacin
have been used experimentally in the treatment of schizophrenia, although no experimental proof has been produced to show its efficacy. In
large amounts it reduces levels of cholesterol in the blood, and it has been used extensively in preventing and treating arteriosclerosis. Large doses
over long periods cause liver damage.
See: Vitamin B6

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Vitamin A
Vitamin B1-Thiamine
Vitamin B2
Vitamin B3 - Niacin
Vitamin B6 - Pyridoxine
Vitamin B12 - Cobalamin
Other B Vitamins
Vitamin C
Vitamin D
"Vitamin," Microsoft® Encarta® Online Encyclopedia 2005
http://encarta.msn.com © 1997-2005 Microsoft Corporation. All Rights Reserved.
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