Life Extension Vitamin B3 Niacin  500 Mg Capsule, 100-Count
Vitamin B3 Niacin 500 mg, 100 capsules Niacin is the only B vitamin that can be synthesized in the body from the amino acid tryptophan. In its coenzyme forms, niacin is crucial to energy transfer reactions, particularly the metabolism of glucose, fat, and alcohol. Niacin’s beneficial effects on blood lipids is well documented