Journal

Science

Longevity NAD+ Supplements Geroscience Nutrition Exercise Sleep Biotechnology Medicine of the future

Established Level B · moderate human evidence

Lifespan and healthspan are not the same question

Lifespan is how long a life lasts. Healthspan is how long it is lived with autonomy. Contemporary geroscience is more interested in the second.

2026-10-05 · 1 sources

Early research Level C · preliminary human evidence

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

NAD+ is a central molecule of metabolism. A precursor raising it in blood does not demonstrate a clinical longevity benefit.

2026-10-05 · 2 sources