Peer-review is a critical part of the functioning of the scientific community, of quality control, and the self corrective nature of science. But it is no panacea.
Niacin is a form of vitamin B3. It is found in foods such as yeast, meat, fish, milk, eggs, green vegetables, and cereal grains. Niacin is also produced in the body from tryptophan, which is found in protein-containing food. When taken as a supplement, niacin is often found in combination with other B vitamins. Do not confuse niacin with niacinamide, inositol niacinamide, nicotinate (inositol hexaniacinate), or tryptophan.
6 Foods Rich in Niacin. The natural element called niacin is one of the main essential nutrients that the body needs for good overall function. Sufficient levels of niacin help with giving the body the energy it needs to accomplish daily tasks. Niacin also helps with digestion, circulation of the blood, and regular functioning of the nervous system.