NADH, also known as coenzyme 1, is a naturally occurring molecule in the body that plays a vital role in energy metabolism. It is used by cells to produce ATP, the primary source of energy for our ...

It's the coenzyme "nicotinamide adenine dinucleotide (NAD)", which is at the origin of the production of ATP. It's present in two forms: "an oxidized form (NAD+) and a reduced form (NADH)".