NAD

Nicotinamide Adenine Dinucleotide is a coenzyme central to metabolism.

NAD exists in two forms: an oxidized and reduced form, abbreviated as NAD⁺ and NADH (H for hydrogen), respectively.

NAD⁺ is listed as not novel in food supplements. NADH is not specifically mentioned, but as one converts to the other and then back again, it is a cyclic reaction and they should be treated the same.