<prompt> Vitamin synthesized from tryptophan -Thiamine Vitamin B1Riboflavin Vitamin B2Niacin Vitamin B3Pyridoxin Vitamin B6  <response>: Ans. is c i.e., Niacin Vitamin B3 o Tryptophan is oxidized to kynurenine, which is then converted to either niacin nicotinic acid or acetyl-CoA. In the reaction alanine is also produced.o Deficiency of tryptophan can cause deficiency of niacin if also deficient in diet. This can leads to Pallegra: dermatitis, diarrhea and dementia.o For every 60 mg of tryptophan, 1 mg. equivalent of niacin can be generated. 