Telomere testing — is it actually worth tracking?

Short answer: no, not really, at any reasonable cost. The intra-individual test-retest variability on a single draw is often as big as any intervention effect. Population-level telomere studies are meaningful. Individual-level tracking is mostly theater.

Epigenetic clocks (DunedinPACE, TruAge) are a better bet for individual tracking than raw telomere length. Still noisy, but less so, and they actually track biological age more directly than telomere length does.

Telomere length is a population-level biomarker that got retailed as a personal metric. The business model works. The science doesn't really support individual decisions.

I ran Life Length twice and stopped. TruDiagnostic is what I'm tracking now. Not claiming it's perfect — but the CV is more reasonable.

Real talk, if you're not actively doing something measurable (like a specific supplement protocol, exercise regimen, dietary change) that you're trying to isolate, even epigenetic clocks are just vanity metrics. You're paying 200-300 bucks to get a number that tells you whether your current lifestyle is working, which you could figure out with basic bloodwork and how you actually feel. The people who find this useful are usually the ones already tracking everything else obsessively anyway.

Tracked telomere length for like 3 years, never saw anything that correlated with actual interventions I was running. The noise floor is real. Switched to just basic bloodwork, DEXA scans when it matters, and honestly feeling better day to day tells you more than watching a number bounce around within its margin of error. If you're already obsessive about tracking, epigenetic clocks are slightly less useless than raw telomere testing, but they're still mostly theater unless you're testing something very specific.