NAD+ (Nicotinamide Adenine Dinucleotide)
Also known as: NAD+, nicotinamide adenine dinucleotide
NAD+ is a coenzyme found in all living cells that plays a central role in cellular energy metabolism. Though not a peptide structurally, it is frequently discussed alongside peptides in longevity research contexts and can be reconstituted similarly to lyophilized peptides for injection.
Overview
Nicotinamide Adenine Dinucleotide (NAD+) is a dinucleotide coenzyme that shuttles electrons in metabolic reactions, serving as an essential cofactor for enzymes involved in cellular respiration (sirtuins, PARP, etc.). NAD+ levels decline with age in most tissues, and restoring NAD+ has been a focus of longevity research. Injectable NAD+ is sold in lyophilized form and reconstituted similarly to research peptides, which is why it is often discussed alongside them despite being chemically distinct from amino-acid-based peptides. Oral precursors such as NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside) are also studied as NAD+ restoration strategies. The research landscape around NAD+ spans metabolism, DNA repair, neuroprotection, and aging biology.
Related Terms
Related Peptide Profiles
Frequently asked questions
Is NAD+ a peptide?+
No. NAD+ is a dinucleotide coenzyme, not a peptide. It is grouped with peptides in some research contexts because injectable NAD+ is formulated and reconstituted similarly to lyophilized peptides.
Why do NAD+ levels decline with age?+
NAD+ consumption by DNA repair enzymes (PARP) and inflammatory processes increases with age, while biosynthesis efficiency declines. The net result is lower cellular NAD+ availability in older tissues.
What is the difference between NAD+ injection and NMN/NR supplements?+
Injectable NAD+ delivers the coenzyme directly into circulation. NMN and NR are oral precursors that the body converts to NAD+. Debate continues about which approach is more effective at raising intracellular NAD+ levels.