NAD+ is a vital coenzyme found in all living cells. It plays a critical role in various biological processes, particularly in energy metabolism and cellular signalling. NAD+ helps convert nutrients into usable energy, supporting overall cellular function and vitality. Involved in the regulation of various metabolic pathways, this molecule helps maintain optimal metabolic balance and may contribute to the control of body weight and metabolic disorders. NAD+ may also offer neuroprotective benefits and support DNA repair to promote longevity.