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.

I trained hard for 25 years and never once measured my cardiorespiratory fitness. A hard program isn't a complete one, and the system you train best hides the ones you never test.

May 27, 2026 · 26 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, a flat CGM, no insulin resistance: every marker the low-carb world calls “safe.” Then a CT angiogram found an 80% blockage in my right coronary artery.

Apr 24, 2026 · 18 min read