Caption: Vitamin B3 (niacin) crystals. Vitamin B3, also know as niacin or nicotinic acid, is a water-soluble vitamin whose derivatives such as NADH play essential roles in energy metabolism in the living cell. Vitamin B3 also includes the amide form, nicotinamide or niacinamide. Severe lack of niacin causes the deficiency disease pellagra, whereas a mild deficiency slows down the metabolism, which in turn decreases cold tolerance and is a potential contributing factor towards obesity. The body can synthesize niacin from the essential amino acid tryptophan but the process is very slow. As serotonin synthesis is reliant on tryptophan availability, inadequate dietary intake of vitamin B3 may also therefore lead to depression. Vitamin B3 has also been used to treat schizophrenia and other mental illnesses. Usually the nicotinamide form is used, as it is considered to be more effective. Unfortunately there is little scientific evidence that this treatment is effective.
Magnification*: x25
Type: LM
Copyright 1985 Dennis Kunkel Microscopy, Inc.
Keywords: 920408-28,12.01.04,B vitamin,B-complex vitamin,B complex vitamin,crystal,crystals,energy metabolism,mental illness,NADH synthesis,niacin,nicotinic acid,nicotinamide,niacinamide,pellagra,schizophrenia,vitamin B3,vitamin B complex,vitamin B deficiency,vitamin B3 deficiency,LM