What's the relationship between tryptophan and niacin?

Answer 1

Niacin is a B vitamin.
Tryptophan is a relaxant not produced by the body and acquired from foods like turkey and cheese.

Answer 2

Tryptophan Niacin

Answer 3

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Pellagra is a vitamin deficiency disease caused by dietary lack of niacin (B3) and protein, especially proteins containing the essential amino acid tryptophan. Because tryptophan can be converted into niacin, foods with tryptophan but without niacin, such as milk, prevent pellagra. However, if dietary tryptophan is diverted into protein production, niacin deficiency may still result. Pellagra is an endemic disease in Africa, Mexico, Indonesia and China. In modern societies, a majority of patients with clinical pellagra are poor, homeless, alcohol dependent, or psychiatric patients who refuse food. Tryptophan is an essential amino acid found in meat, poultry, fish, and eggs. If one's diet contains these foods, one's need for niacin from other sources will be reduced. The relationship between lysine and pellagra is unclear.

Answer 4

Tryptophan can be converted into nicotinic acid (niacin) by the body, however, the body cannot produce enough niacin from tryptophan to satisfy the body's requirements for niacin. Thus, niacin is required in the diet, making it a 'vitamin'.

Answer 5

niacin is a vitamin B3, necessary for energy production
tryptophan is an essential (must come from diet) amino acid (building block of proteins).

ADD
megan is right!
I was just not doing Tom's homework for him ;-)

Answer 6

Freetochoose is right however i'm not sure that's what you were asking...i think you wanted to know how they are related? Well when tryptophan is broken down in the body it generates 90% nicotinic acid (B3) which then goes on to form NAD and NADP (which are involved in glycolysis and Kreb's and Electron transport chain); 10% goes to form seratonin and 1% of that goes to form melatonin.