title: Niacinamide and acanthosis nigricans.
mesh_terms: D000052:Acanthosis Nigricans / Q000139:chemically induced*; D000328:Adult; D002648:Child; D006801:Humans; D008297:Male; D009536:Niacinamide / Q000009:adverse effects*
chemical_list: D009536:Niacinamide