What it does
A coenzyme found in every living cell that supports energy production (ATP) and DNA repair. Levels decline with age, which is why it has become a popular longevity ingredient.
Best for
Mature skin and routine-builders looking for emerging longevity-science ingredients. Used in numbuzin's No.9 line and in Medik8's Pro-Collagen+ Peptide Cream as 'NAD+ Longevity Booster'.
The full picture
NAD+ levels decline as we age, and that decline has been linked to the visible and cellular signs of aging. Oral NAD+ precursors (nicotinamide riboside, nicotinamide mononucleotide) have a decade of supplementation research behind them. Topical NAD+ is much newer and the open question is whether the molecule can meaningfully cross the stratum corneum to affect cellular processes in living skin. The brands using it position it as a longevity ingredient rather than a wrinkle-reduction active. Treat current marketing claims as emerging science rather than established proof.
Evidence
NAD+ supplementation has been linked to cellular repair and energy metabolism. Topical efficacy on human skin is still emerging research.
Read the source: PubMed: NAD+ in aging biology ->
