Switch Nutrition NMN 60 CapsSwitch Nutrition NMN 60 Caps About Vitamins. co. nz Switch Nutrition NMN NMN (Nicotinamide Mononucleotide) is a precursor to Nicotinamide Adenine Dinucleotide + (NAD+) which is involved in energy metabolism, metabolic processes, inflammatory response, cellular aging and much more. Our NMN is 3rd party tested to >99. 9% purity. As we age NAD+ declines and supplementing with NMN has been shown to increase NAD+ levels to help support healthy aging.