Nicotinamide adenine dinucleotide (NAD) is a coenzyme found in all living cells. The compound is a dinucleotide, because it consists of two nucleotides joined through their phosphate groups. One nucleotide contains an adenine base and the other nicotinamide. Nicotinamide adenine dinucleotide exists in two forms, an oxidized and reduced form abbreviated as NAD+ and NADH respectively.

Function:
NAD is useful for various life processes which are responsible for the proper maintenance and functioning of the body. Basically, it is used to generate energy in the body and to guard against many diseases. Some of the uses of NAD are
1.Nicotinamide adenine dinucleotide (NAD) for Skincare: Being the highest coenzyme in metabolic process and the ability to repair damaged cells make NAD the most potent antioxidant. It helps in reducing the signs of aging and works as an essential element in skin care and provides energy to the aged and dead cells. NAD bears top position in the category of anti-aging elements. It repairs the damaged cells and increases their lifespan.
2.NAD in Cellular Respiration: NAD is an important enzyme in generating (Adenosine triphosphate) ATP which is the most important part of cellular respiration. Every cell in the body needs thousands of units of ATP and Nicotinamide adenine dinucleotide(NAD) helps in attaining this resource for the cells.
3.NADH in Supplements: There are many supplements available in the market containing NADH because it helps in repairing of damaged DNA and cells by promoting the growth of hormones and other useful elements in process of growth.
4.NADH for Chronic Fatigue Syndrome(CFS): Chronic fatigue syndrome is a kind of mental state with extreme fatigue and NAD helps in releasing stress and pressure from the patients suffering from CFS.