NAD, or nicotinamide adenine dinucleotide, is a coenzyme found in all living cells, and it’s required for the fundamental biological processes that make life possible. NAD is a compound found in every cell in your body and involved in many critical processes, including energy metabolism, DNA repair, and gene expression. NAD levels decline as we age. A powerful dose NAD supplement can greatly improve your energy levels, promote mitochondrial integrity (energy-producing capacity of our cells), and even improve our sleep and mood. Studies have shown maintaining NAD levels is an essential component of mitochondrial health. Similar to NMN Supplements.