NMN, short for β-nicotinamide mononucleotide, occurs naturally in living cells and is a precursor to the coenzyme 1 NAD+ (nicotinamide adenine dinucleotide). Life can be appropriately extended. What really plays an anti-aging role is an important energy metabolite called nicotinamide adenine dinucleotide (NAD+). Studies have shown that NAD supplements such as NMN can help prevent apoptosis of cells infected by the new crown virus and promote the repair of damaged cells