Longevity Supplements: What the Evidence Actually Says
A grounded look at the most-discussed longevity supplements — and where the science currently stands.
Supplements can't replace lifestyle — but a few have meaningful evidence as add-ons once food and habits are already in place.
Vitamin D
Deficiency is common and clearly linked to worse outcomes. Test and supplement to a healthy range under guidance.
Omega-3 (EPA/DHA)
Lowers triglycerides and supports brain and cardiovascular health, particularly if you eat little fish.
Creatine
The best-studied supplement for muscle, with emerging evidence for cognition in older adults.
Magnesium
Supports sleep, blood pressure and muscle relaxation in people who are low.
Where evidence is thinner
NMN, NR, and most 'anti-aging' compounds remain promising but unproven for healthspan in humans.
Frequently asked questions
+Do I need a multivitamin?
If your diet is consistently nutrient-dense, probably not. A targeted approach to deficiencies works better than blanket supplementation.
Sources & references
Background reading
- Office of Dietary Supplements — Fact Sheets — US NIH
- Health Topics A–Z — US NIH National Center for Complementary and Integrative Health