Longevity Ledger

The evidence-scored directory for men over 40.

Lab testing, hormone clinics, wearables, sleep and recovery gear, and supplements. Every listing carries a transparent 1-5 evidence score, so you can separate what works from what is marketing.

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Featured

Lab Testing

Function Health

Featured
4/5 Good

Membership service that orders a broad panel of blood biomarkers (100+) with clinician review and a results dashboard.

Annual membership; check site · US

Lab Testing

Superpower

Featured
4/5 Good

Membership blood-testing service with a wide biomarker panel, clinician review and add-on tests.

Annual membership; check site · US

Hormone & TRT Clinics

Marek Health

Featured
4/5 Good

Lab-driven telemedicine focused on hormones, metabolic health and cardiovascular risk, with physician oversight.

Membership plus labs; check site · US

Wearables & Monitors

Oura Ring

Featured
4/5 Good

Smart ring tracking sleep, resting heart rate, HRV, temperature trends and activity.

Hardware plus monthly membership; check site · Global

Wearables & Monitors

Garmin Fenix series

Featured
4/5 Good

Rugged multisport GPS watch with sleep, HRV status, training load, VO2max estimates and long battery life.

Premium watch pricing; check site · Global

Featured
3/5 Mixed

Smart mattress cover that actively cools or warms each side of the bed and tracks sleep.

Premium price; check site · US, CA, UK, EU, AU

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The weekly Ledger

One email a week: new listings, price changes and the studies that matter.