NAD (Nicotinamide Adenine Dinucleotide) is a synthetic form of the essential coenzyme (not a peptide; composed of two nucleotides with no amino acids in its structure).

It was discovered in 1906 by British biochemists Arthur Harden and William John Young during fermentation studies at the Lister Institute (no single commercial company founded the native molecule; it originated from academic biochemical research).

Researchers have investigated NAD in preclinical and clinical models for its central role in cellular energy metabolism, redox reactions, and sirtuin activation. 

Primary areas of exploration include age-related NAD+ decline, metabolic health (insulin sensitivity, mitochondrial function), neurodegenerative conditions, cardiovascular support, tissue repair, and overall cellular resilience in aging and disease models.