Category

Longevity

Longevity supplements sell a claim that's nearly impossible to test directly in humans — nobody runs a decades-long randomized trial measuring lifespan. What actually exists behind most of these (NAD precursors, resveratrol, fisetin, spermidine, and similar) is animal research and mechanistic work on aging pathways, plus a smaller number of human trials on surrogate markers like inflammation. Read the grade here as evidence-of-mechanism, not evidence-of-more-years.

6 products · sorted by evidence grade

Quercetin

B

A well-studied flavonoid with decent anti-inflammatory and immune evidence, plus emerging interest as a senolytic when paired with dasatinib.

ImmuneSkin & Anti-Aging

Fisetin

C

A senolytic flavonoid with striking mouse data on clearing senescent cells, but human clinical trials are only just beginning — hype check candidate.

Skin & Anti-Aging

NAD+ Precursors (NMN/NR)

C

Animal data on NAD+ restoration is genuinely exciting, but human longevity evidence remains thin — this is a hype check candidate.

Skin & Anti-AgingEnergy & Fatigue

PQQ

C

Pyrroloquinoline quinone shows mitochondrial support in cell and animal studies, but human evidence is limited to small pilot trials with modest results.

Energy & FatigueBrain & Cognitive

Resveratrol

C

The famous 'red wine molecule' has disappointing human translational evidence despite decades of hype — a classic case of animal data not panning out.

Heart & CardiovascularSkin & Anti-Aging

Spermidine

C

An autophagy-promoting polyamine with promising epidemiological links to longevity, but interventional human evidence is still early-stage.

Skin & Anti-Aging
Narrow it down
Best Longevity for Skin & Anti-Aging

When the evidence changes, we’ll tell you.

One short email a month. New A-grades, downgraded claims, and reader questions.

Medical disclaimer. The information on this site is provided for educational purposes only and is not intended as medical advice. It does not constitute a diagnosis, treatment plan, or recommendation for any specific health condition. Always consult a qualified healthcare professional before making changes to your supplement regimen, diet, or lifestyle — especially if you are pregnant, nursing, taking medications, or managing a medical condition.

Affiliate disclosure. Some links on this site are affiliate links. If you purchase through them, we may earn a small commission at no extra cost to you. This never influences our editorial assessments — products are graded solely on the evidence.