Biological age testing on peptides — Elysium vs TruDiagnostic

TruDiagnostic with DunedinPACE is what I use. The pace-of-aging metric is more stable test-retest than single-point epigenetic age. Elysium Index is fine but more expensive per draw with less clear advantage.

All the consumer epigenetic age tests share the underlying issue that at the individual level, changes smaller than 0.5-1 year are inside the measurement noise. Don't over-interpret small movements. Quarterly draws look noisy for exactly this reason.

I draw TruDiagnostic every 6 months rather than quarterly. At quarterly the noise dominates. At 6 months you start to see trend.

Epigenetic clocks are better than telomere tests. Still noisy. Best used for trend over years, not A/B testing specific protocols over weeks.