NAD

Energy metabolism: NAD is a key coenzyme in the intracellular oxidative phosphorylation process and participates in the process of converting nutrients in food into energy.
DNA repair: NAD plays an important role in the DNA repair process, helping to maintain the integrity of the cell's genetic information.
Antioxidant: NAD is involved in regulating intracellular redox balance, helping to remove free radicals and reducing the damage to cells caused by oxidative stress.
Aging delay: NAD plays an important role in cell aging and apoptosis, and some studies have shown that increasing NAD levels may help delay the aging process.
Immunomodulation: NAD is involved in regulating the function of the immune system, helping to maintain the balance and normal function of the immune system.

NAD is often used in health care products and medicine.