Nicotinamide is an amide derivative of vitamin B3 and a PARP inhibitor
Nicotinamide serves as a precursor for β-nicotinamide adenine dinucleotide (NAD+) coenzyme production. It is involved in the synthesis of NAD+ phosphate (NADP+). It also regulates the mechanism of cell survival and cell death. Fatigue, skin pigmentation, decreased appetite and mouth ulcers are indications of nicotinamide deficiency. Its chronic deficiency can lead to pellagra. Nicotinamide is known to show protective effects on oxidative stress.