NAD+ as a Currency of Cellular Energy Status and Redox Balance

Edisnap· Feb 24, 2026

This infographic illustrates how the age-related decline of NAD+ acts as a cellular 'currency crisis,' impairing vital functions like energy production and genome maintenance. Boosting NAD+ through precursors like NMN/NR restores these functions, leading to improved cellular health and extended lifespan.

NAD+ has emerged as a central molecule in aging research. It declines with age, and boosting it (via precursors like NMN or NR) extends lifespan in some models. But why does NAD+ matter so much?

NAD+ is not merely a cofactor—it is a currency. Cells use NAD+ to pay for three critical functions: energy production (glycolysis, TCA cycle, oxidative phosphorylation), redox balance (maintaining reducing environment), and signaling (sirtuins, PARPs, CD38).

Hypothesis: NAD+ decline with age represents a fundamental currency crisis. The cell cannot simultaneously fund energy production, genome maintenance, and stress responses. Prioritization decisions shift with age, contributing to functional decline.