Purity >95%. Beta-Nicotinamide mononucleotide (Beta-NMN) is an intermediate in the biosynthesis of nicotinamide adenine dinucleotide (NAD+ ). Nicotinamide phosphoribosyltransferase (Nampt) catalyzes the condensation of nicotinamide with 5-phosphoribosyl-1-pyrophosphate to generate Beta-NMN, which is subsequently converted to NAD+ by Beta-NMN adenyltransferase. At 50-100 μM, Beta-NMN has been used to enhance NAD biosynthesis and glucose-stimulated insulin secretion in a Nampt+/- mouse model of metabolic disease, demonstrating a role for Nampt in Beta cell function. Furthermore, at 500 mg/kg/day, it has been shown to ameliorate glucose intolerance in high-fat diet-induced type 2 diabetes mice by restoring NAD+ levels.