NAD+

Also: nicotinamide adenine dinucleotide

Nicotinamide adenine dinucleotide ... a coenzyme required for cellular energy production, DNA repair, and sirtuin activity.

NAD+ is one of the central helper molecules in human metabolism. Cells use it to shuttle electrons for energy production, to support DNA repair enzymes, and to power sirtuins that regulate stress response, mitochondrial function, and aspects of cellular maintenance.

NAD+ matters on Supplements Apothecary because several longevity-focused compounds are discussed through this pathway. NMN and nicotinamide riboside are used as precursors intended to raise NAD+ availability. Resveratrol is frequently discussed alongside NAD+ because sirtuins require NAD+ to do their work. In other words, NAD+ is less a niche term than a central organizing concept for a large slice of modern longevity supplementation.

When NMN or nicotinamide riboside is described as a longevity supplement, the real target is usually improved NAD+ availability rather than the precursor molecule itself.

Raising blood NAD+ is not the same thing as proving a broad anti-aging effect. The pathway is biologically important, but the strongest real-world claims still require human outcomes, not just mechanism.