In this guide
NAD+ stands for nicotinamide adenine dinucleotide. A quick note that matters: it's a coenzyme, not a peptide (peptides are chains of amino acids). But it sits so squarely in the same longevity research conversation that it belongs alongside them, which is why it anchors our anti-aging and longevity guide. Every living cell contains NAD+, and it's absolutely essential to staying alive — it's not an optional add-on but core machinery.
What it actually does
NAD+'s headline job is in energy metabolism. When your cells convert food into usable energy, that process runs on a series of chemical reactions that pass electrons from one molecule to the next — and NAD+ is one of the main shuttles carrying those electrons. Without enough NAD+, the energy-production line slows down. On top of that, NAD+ is a required ingredient for enzymes involved in DNA repair and cellular signaling. Because it participates in so many fundamental processes at once, its availability inside cells is a huge research topic.
The age-decline story
Here's the fact that makes NAD+ a longevity centerpiece: its levels fall as we age. Cells produce less of it and consume more of it over time, so the pool shrinks. Since NAD+ is tied to energy production and repair, that decline is exactly the kind of change aging researchers want to understand — a core molecule becoming scarcer just as the systems that depend on it are under more strain. That's why NAD+ and the pathways that make it are among the most heavily studied topics in cellular-aging research.
How it fits with the peptides
NAD+ pairs naturally with the mitochondrial peptides in the longevity space. MOTS-c and SS-31 both act at the mitochondria — the cell's power plants — approaching cellular energy from a peptide angle, while NAD+ approaches it as the coenzyme that energy reactions actually run on. It's offered in multiple research vial sizes. Like any research compound, it arrives freeze-dried and needs reconstitution and proper storage.
Researching NAD+? Available in several vial sizes, third-party tested and USA-sourced.
View NAD+Frequently asked questions
What is NAD+? Nicotinamide adenine dinucleotide, a coenzyme in every cell that's essential to energy metabolism. It's a coenzyme, not a peptide, but central to longevity research.
What does it do? It shuttles electrons in energy-producing reactions and is required by enzymes involved in DNA repair and signaling.
Why does it decline with age? Cells make less and use more over time, shrinking the pool — a central theme in cellular-aging research.
Is it approved for human use? No. It's sold strictly for in-vitro research and laboratory use only and is not intended for human consumption.
For in-vitro research and laboratory use only. Not for human consumption. This guide describes research context and mechanisms in general terms; it is not medical advice and makes no claims about outcomes in humans.