Research

Hormonal

Metformin improves healthspan and reduces early mortality from age-related diseases (cardiovascular disease, cancer, diabetes) but does not directly extend maximum lifespan in humans.

If you have Type 2 Diabetes or are at high risk, metformin is a standard, safe, and effective treatment that significantly reduces your risk of heart disease, cancer, and early death. While it may not make you live to 100, it helps you stay healthy longer by managing blood sugar and protecting your blood vessels. Discuss with your doctor if it is appropriate for you, keeping in mind potential stomach upset which can often be managed.

GoodQualifiesHIGH confidence
we conclude that the beneficial effects of metformin on aging and healthspan are primarily indirect via its effects on cellular metabolism and result from its anti-hyperglycemic action... Based on the available evidence we conclude that the beneficial effects of metformin on aging and healthspan are primarily indirect... the evidence that metformin increases lifespan remains controversial.
Ibrahim Mohammed et al. · Frontiers in Endocrinology · 2021

Why this rating

Based on a critical review of multiple large-scale clinical trials (UKPDS, MILES, ORIGIN) and pre-clinical studies, though the authors note controversies and mixed pre-clinical results.

Source

A Critical Review of the Evidence That Metformin Is a Putative Anti-Aging Drug That Enhances Healthspan and Extends Lifespan

Ibrahim Mohammed et al. · Frontiers in Endocrinology · 2021

DOI 10.3389/fendo.2021.718942

narrative_reviewCited 263×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →