NMN (Nicotinamide mononucleotide) : full name "β -nicotinamide mononucleotide", is a naturally occurring bioactive nucleotide.There are two irregular forms of NMN, α and β.β isomer is the active form of NMN with a molecular weight of 334.221g/mol.Because nicotinamide belongs to vitamin B3, NMN belongs to the category of vitamin B derivatives, which is widely involved in a number of Biochemical reactions in human body, and is closely related to immunity and metabolism.

The substance is inherent in the human body and is also found in some fruits and vegetables.In the human body, NMN is the most direct precursor of NAD+, and its function is manifested through NAD+.NAD+, also known as coenzyme I, is a nicotinamide adenine dinucleotide that exists in every cell and is involved in thousands of reactions.The nicotinamide adenine dinucleotide (NAD) molecule plays an important role in a variety of cellular metabolic reactions and is an important support for cell viability.

Decline in NAD during aging is thought to be a major cause of disease and disability, such as hearing and vision loss, cognitive and motor dysfunction, immune deficiency, arthritis due to dysregulation of autoimmune inflammatory responses, metabolic disorders, and cardiovascular disease.Therefore, NMN supplementation increases the NAD+ content in the body, thus delaying, improving, and preventing various age-related phenotypes, or age-induced metabolic disorders, diseases of aging, etc.