Do Epigenetic Age Tests Actually Measure Aging?

Most people in the longevity community are spending $300–$600 per test on epigenetic age testing. Many are testing quarterly. Almost none of them know about the reproducibility problem.

The same person, tested twice within 30 days, can see a 5–10 year swing in their biological age result. Not because their biology changed. Because the test is that noisy.

This report covers:

• Which clocks actually predict mortality — and which ones don't
• Why quarterly tracking is likely measuring noise, not biology
• The cost of getting this wrong: $1,200–$2,400/year on questionable data
• The one clock worth using — and exactly how to use it
• Final verdict on GrimAge, DunedinPACE, Horvath, GlycanAge — Start / Stop / Wait / Avoid

Every claim is scored against a structured evidence rubric. Human trials only. No animal studies dressed up as human evidence. No affiliate relationships. No sponsor bias.

The full report is 9 sections. $39.