Niacin is the only B vitamin that can be synthesized in the liver from the amino acid tryptophan on average 1 mg of niacin can be synthesized from the ingestion of 60 mg of tryptophan.148-150 In its coenzyme forms niacin is crucial to energy transfer reactions particularly the metabolism of glucose fat and alcohol.151152 Niacins beneficial effects on blood lipids is well-documented.Other products from HerbsPro