Using certain supplements like NMN or nicotinamide riboside might help older skin stay healthier by boosting cell energy, reducing damage, and increasing collagen — the stuff that keeps skin firm.

Giving older mice supplements like NR or NMN might help their cells' energy factories work better and handle damage from aging.

As we get older, levels of a molecule called NAD+ in our skin go down, which slows down important repair processes and makes skin heal slower and break down over time.