What Is NADH? NADH is a crucial coenzyme in making ATP. It exists in two forms in the cell: NAD+ and NADH. The first form, NAD+, is called the oxidized form. When a molecule is in an oxidized.

Nicotinamide adenine dinucleotide ( NAD) is a coenzyme central to metabolism [3]. Found in all living cells, NAD is called a dinucleotide because it consists of two nucleotides joined through their phosphate groups. One nucleotide contains an adenine nucleobase and the other nicotinamide.

Nicotinamide Adenine Dinucleotide in its oxidized state is called NAD+, after being reduced (or accepting electrons), it is referred to as NADH. See figure 4 for a molecular illustration. The vitamin Niacin (also called B3) is used to derive this compound.