Science

Early research Level C · preliminary human evidence

NAD+: what science knows and what it still does not

2026-10-05

NAD+ means nicotinamide adenine dinucleotide. It takes part in redox reactions, in mitochondrial energy, and in cellular signals that depend on enzymes such as sirtuins and PARPs.

With age, several tissues show less NAD+. In animals, restoring that molecule was associated with metabolic changes and, in some models, with more health or more life. That does not transfer to people on its own.

In humans, precursors such as NR and NMN can change NAD-related biomarkers. Evidence that this produces a meaningful clinical benefit against aging, or more years of life, is still under investigation. Don't Die Now does not label NAD+, NR, or NMN as life extenders.

Sources

1. Therapeutic Potential of NAD-Boosting Molecules: The In Vivo EvidenceRajman L, Chwalek K, Sinclair DA. Cell Metabolism, 2018.DOI 10.1016/j.cmet.2018.02.011Reviews the role of NAD+ and of molecules that raise it. The lifespan extension it cites comes mostly from animal models.
2. NAD+ and sirtuins in aging and diseaseImai S, Guarente L. Trends in Cell Biology, 2014.DOI 10.1016/j.tcb.2014.04.002Describes NAD+ and sirtuins as an axis of metabolism and aging in the experimental literature.