Articles

Evidence-first essays on cardiovascular risk, longevity biology, and the gap between standard cardiac testing and what’s actually accumulating in your arteries.

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Calibrated Signal hero card for I Crushed My ApoB to 38, Nobody Measured My Small Vessels: a wide open coronary artery in cross-section branching downstream into a dense network of tiny inflamed red micro-vessels.
Cardiovascular RiskAging Biology

I Crushed My ApoB to 38. Nobody Measured My Small Vessels.

Cholesterol is half the job. Inflammation in the microvasculature is the other half, and it is the layer a standard cardiac workup never actually measures.

Jul 27, 2026 · 20 min read
Calibrated Signal hero card for The Heart-Attack Risk Hiding in Your Immune Cells: a single glowing rogue blood cell among immune cells, with a DNA strand carrying one break.
Aging BiologyDiagnostic Toolkit

The Heart-Attack Risk Hiding in Your Immune Cells

A blood mutation called CHIP turns your own immune cells against your arteries, and it is the cleanest case study I know for how the biology of aging drives chronic disease.

Jul 14, 2026 · 28 min read
Calibrated Signal hero card reading 'Real Mechanism. Wrong Certainty.' over a stylized coronary artery, with the line: 5-Amino-1MQ, injected mice, and the heart arrow nobody measured.
InterventionsEvidence Critique

The Longevity Compound Promoted on Half a Mechanism

Its entire case for your heart is one biochemical arrow. I followed the other one, the one that runs the wrong way, and as a guy with a stent I walked away.

Jul 2, 2026 · 18 min read
Calibrated Signal hero card for The Question No One Asked, on what a stent procedure can and cannot tell you about a silent heart injury.
Diagnostic ToolkitPatient Advocacy

The Question No One Asked

A stent fixed my blockage. No test in that room could say whether a silent heart attack had already left a scar.

Jun 29, 2026 · 18 min read
Calibrated Signal hero card for The Heart Attacks You Never Feel, on how a coronary blockage can be built by silent plaque ruptures.
Cardiovascular RiskPatient Advocacy

The Heart Attacks You Never Feel

A coronary blockage can be built by silent ruptures that heal in secret. Mine probably was, and I still spent years refusing the proven treatment that stops them.

Jun 20, 2026 · 16 min read
Calibrated Signal article hero card for The Plaque a Calcium Score Can't See, contrasting a calcium-only heart scan with a coronary CT angiogram that reveals soft plaque.
Diagnostic ToolkitCardiovascular Risk

The Plaque a Calcium Score Can't See

A severe blockage. A calcium score that would have read zero. And if you ever get chest pain, the one question that gap should make you ask.

Jun 11, 2026 · 15 min read
A left-to-right flow diagram on a dark background reading: Metformin, acts in the gut, less citrulline, less nitric oxide, less blood flow to muscle. The heading reads, the concern did not disappear, it moved upstream.
Aging BiologyInterventions

The Gut May Be the Point: Metformin, Citrulline, and the Exercise Question

A new Nature Metabolism paper places metformin's main effect in the gut, not muscle. That eases one exercise-blunting fear and raises a sharper one: citrulline and nitric oxide.

Jun 3, 2026 · 16 min read
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: What Twenty Years of “Borderline” Blood Pressure Actually Costs You, over a blood-pressure cuff beside a monitor showing a continuous arterial waveform.
Cardiovascular RiskAging Biology

What Twenty Years of “Borderline” Blood Pressure Actually Costs You

A single 132/85 at 35 isn’t a snapshot. It’s a 20-year dose your arteries are already logging, and “borderline” is the word that hides the bill.

May 14, 2026 · 28 min read
Calibrated Signal featured card: What Twenty Years of “Borderline” LDL Actually Costs You — an hourglass whose falling sand is made of copper cholesterol particles.
Cardiovascular Risk

What Twenty Years of “Borderline” LDL Actually Costs You

A single LDL of 145 at 35 isn’t a snapshot. It’s a 30-year exposure your arteries are already logging, and “borderline” is the word that hides the bill.

May 2, 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
Calibrated Signal featured card: I Was Doing Almost Everything Right. It Wasn’t Enough. — a dark navy still life of a smartwatch, ring, recovery devices, and a glowing red-light therapy panel.
Cardiovascular RiskPatient Advocacy

I Was Doing Almost Everything Right. It Wasn’t Enough.

I’ve told you about the blockage . I’ve told you about the science the keto world gets wrong . I’ve told you about the tests that missed it and the figh…

Apr 12, 2026 · 12 min read
Calibrated Signal featured card: The Battle for the Coronary Artery Scan That Saved My Life, a translucent heart inside a CT scanner ring on dark navy.
Diagnostic ToolkitPatient Advocacy

The Battle for the Coronary Artery Scan That Saved My Life

I passed the full cardiac workup, all normal. The fight was not against my cardiologist, but against the false comfort of being statistically unlikely.

Mar 30, 2026 · 18 min read
A grid of cardiac and metabolic test results, exercise stress test, resting ECG, Holter monitor, echocardiogram, a metabolic panel, and lipoprotein(a), each marked NORMAL with a green check.
Diagnostic ToolkitPatient Advocacy

I Aced Every Cardiac Test. I Still Had an 80% Blockage.

My ECG, echo, Holter, labs, and wearables all looked reassuring. None of them mapped my coronary arteries. Here is the blind spot that nearly killed me.

Mar 29, 2026 · 19 min read
Calibrated Signal featured card: The Keto Study Used to Dismiss LDL, Then It Was Retracted — an artery cross-section with glowing plaque on dark navy.
Evidence CritiqueCardiovascular Risk

The Study the Keto Community Uses to Say LDL Doesn’t Matter. Then the Follow-Up Got Retracted.

A keto study is cited to argue high LDL is harmless when metabolic markers are clean. The follow-up that measured soft plaque was retracted in 2026. Here's what the evidence shows.

Mar 27, 2026 · 21 min read
Calibrated Signal featured card: An 80% Blockage at 44, Every Test Said Fine — a translucent heart with copper coronary arteries on dark navy.
Patient AdvocacyDiagnostic Toolkit

I Had an 80% Coronary Blockage at 44. Every Test Said I Was Fine.

My name is Nick Hanson. I’m a former health and wellness industry CEO turned clinician-scientist. I’ve been from the boardroom, to the bench, to the bed…

Mar 24, 2026 · 11 min read