Calibrated SignalHard science. Honest signal.

Topic

Epigenetic Clocks

DunedinPACE, GrimAge, PhenoAge — the closest thing we have to a real-time readout of biological aging. What they measure, what they don't, and the data on whether any intervention actually moves them.

2 articles

Calibrated Signal article hero: I Trained Hard for 25 Years. I Was Measuring the Wrong Fitness. A lean, dark-haired man in his 40s stands facing a dim gym mirror, studying his own muscular reflection.
Cardiovascular RiskAging Biology

I Trained Hard for 25 Years. I Was Measuring the Wrong Fitness.

VO2 max carries one of the strongest survival signals in medicine, with no ceiling found. I lifted five hours a week for 25 years and never measured mine once.

May 27, 2026 · 17 min read
Calibrated Signal featured card: Metabolically Healthy Isn’t a Diagnosis, a coronary artery cross-section with soft yellow plaque on dark navy.
Evidence CritiqueCardiovascular Risk

I Was “Metabolically Healthy.” I Got a Stent at 44 Anyway.

Low hsCRP, flat CGM, no insulin resistance, LDL 150s on keto: every marker the low-carb world calls safe. Then a CT angiogram found an 80% blockage at 44.

Apr 24, 2026 · 14 min read