What is NAD+ therapy?

NAD+ is a coenzyme central to cellular energy metabolism and DNA repair, and its levels decline with age. It is offered as a compounded preparation by subcutaneous injection or intravenous infusion. It is not FDA-approved for this use, clinical evidence for longevity outcomes in humans is limited, and protocols are not standardised. Infusion is commonly associated with flushing and discomfort, which is rate-dependent.