Supplements Studied for Extending Lifespan: Evidence, Safety, and What the Research Says

Supplements promoted for lifespan extension range from multivitamins and omega-3s to NAD+ precursors, spermidine, taurine, creatine, probiotics, fiber, and polyphenols. This guide separates human mortality evidence from biomarker, animal, and mechanistic data—then explains safety, interactions, and what research does not prove.