NAD+

NAD+ (Nicotinamide adenine dinucleotide) is a coenzyme that plays a crucial role in various cellular processes, including energy metabolism, DNA repair, and cellular stress response. 

NAD+ is found in every cell in your body and is essential for creating cellular energy and maintaining cellular health. NAD+ helps to regulate the body's energy production by stimulating the production of ATP, the body's primary source of energy. In the body, NAD+ is primarily stored in the mitochondria, which are the powerhouse of the cells responsible for producing energy.