NAD+ (Nicotinamide Adenine Dinucleotide) is a naturally occurring coenzyme found in every living cell that plays a fundamental role in cellular energy production and metabolism. It is essential for mitochondrial function, DNA repair, and the activity of enzymes involved in maintaining cellular health and responding to oxidative stress. Because NAD+ levels naturally decline with age, it has become an important molecule in scientific research exploring cellular metabolism, healthy aging, and mitochondrial biology. For research use only. Not intended for human consumption or therapeutic use.