Science-backed longevity research
Expert-reviewed guides on anti-aging supplements, biohacking, skincare science, and the latest longevity research — all backed by peer-reviewed evidence.
What we cover
I've spent 25+ years researching anti-aging, joint health, and longevity — working through thousands of peer-reviewed studies and self-experimenting with the protocols I write about. I built Ageless Authority because most anti-aging content is either too academic or too commercial to trust.
Steve Butler Health Writer & Longevity Researcher · 25+ Years Researching Anti-Aging & Joint Health ✓ Site FounderFive research-driven topic areas covering every dimension of healthy ageing — from supplements to sleep, skincare to cellular biology.
Independent reviews of NMN, NAD+, resveratrol, collagen, CoQ10, spermidine and more — dosages, side effects, and what the science actually says.
Browse all supplement guides →The evidence behind retinol, vitamin C, peptides, hyaluronic acid, and SPF — ingredient-by-ingredient breakdowns reviewed by dermatologists.
Explore skincare science →Intermittent fasting, sauna protocols, Zone 2 cardio, cold therapy, sleep optimisation — practical longevity tools with the evidence to back them.
Start biohacking →Mediterranean diet, anti-inflammatory eating, protein for muscle mass, and the dietary patterns from the world's longest-lived populations.
Optimise your diet →The 12 Hallmarks of Ageing, telomere biology, cellular senescence, and the researchers — Sinclair, Attia, Longo — driving longevity science forward.
Explore the science →Our free guide: the 10 most evidence-based interventions for slowing biological ageing, distilled from 500+ studies.
Get the free guideWe evaluated 40+ longevity supplements across efficacy, safety, dose, and value. Here are the 7 that actually pass scientific scrutiny.
Harvard's leading longevity researcher takes NMN, resveratrol, metformin and more. We break down his full stack — and what the evidence says about each.
NMN is one of the most-discussed longevity supplements. We tested and reviewed the top brands for purity, dose, third-party testing, and value for money.
In a space full of marketing hype and pseudoscience, we hold ourselves to a different standard.
Every health article is reviewed by a credentialled professional — pharmacist, GP, dietitian, or dermatologist — before publication.
We only make claims supported by peer-reviewed research. Every key claim links to the original study on PubMed or an authoritative source.
Longevity science moves fast. We review and update our articles quarterly to ensure recommendations reflect the latest evidence.
We earn commissions from some links. This is disclosed on every page and never influences our rankings — we call out products that underperform.
Supplement brands cannot pay to be featured or ranked higher. Our editorial decisions are entirely independent of commercial arrangements.
We share limitations, conflicting evidence, and appropriate caveats. Longevity science is evolving — we never overstate what is known.
The 10 most evidence-based interventions for slowing biological ageing — distilled from 500+ peer-reviewed studies into a single practical guide. Free, no spam.