About us
The independent guide to biological age testing
IntrinsicAge exists because the biological age testing market deserves an honest, evidence-first resource that puts consumers ahead of vendors.
Why this exists
The market for biological age tests is growing rapidly. Consumers can now measure their epigenetic age, glycomic age, phenotypic age, and more — often for a few hundred dollars. But the space is confusing: vendor claims are aggressive, independent validation varies wildly, and there is no single trusted resource that compares everything honestly.
IntrinsicAge fills that gap. We catalog every major test with evidence-based ratings, explain the science without jargon walls, and always note what a test cannot tell you alongside what it can.
We are informed by the critical scientific lens of researchers like Kriukov et al. (2025), who challenge the field to demonstrate that aging clocks provide genuine advantages over simpler alternatives. This skepticism is healthy, and it guides our editorial approach.
Our principles
Evidence-rated
Every test, clock type, and intervention is rated using our four-tier evidence framework (Strong, Promising, Emerging, Insufficient). Tiers are based on published, peer-reviewed research.
No vendor affiliations
We receive no affiliate commissions, referral fees, or sponsorships from any test vendor. Our assessments are not influenced by commercial relationships.
Honest about uncertainty
A biological age number is an estimate, not a diagnosis. We always highlight limitations, confounders, and what science does not yet know.
Consumer-first
Content is written for people considering these tests, not for industry insiders. We translate scientific complexity into actionable understanding.