The Ecology of Humans (46-2-3) Vitamin B3


Vitamin B3 (C6NH5O2; aka niacin) is an essential nutrient – but in a sense, is not really a vitamin at all, as B3 need not be in the diet. Niacin can be manufactured from the essential amino acid tryptophan (C11H12N2O2). Niacin is found in a variety of foods, including whole grains, legumes, nuts, avocados, and fish.