[Research Progress in Niacinamide in the Prevention and Treatment of Mouth and Systemic Diseases].

Nicotinamide (NAM) is the amide form of niacin and one of the precursors of nicotinamide adenine dinucleotide (NAD ). NAM can be used as a dietary supplement or clinical therapeutic drug to replenish NAD levels in the human body and participate in key bodily functions such as cellular metabolism and DNA repair. NAM has the advantage of low cost, wide availability, and sound biosafety.