8 articles

Diagnostic Tests

Reviews of at-home and lab diagnostic panels for longevity optimisation.

The 12 Longevity Biomarkers You Should Be Tracking (And What They Mean)

Not all blood tests are equal. These 12 biomarkers predict healthspan better than standard annual panels — with reference ranges optimised for longevity, not just disease avoidance.

Dr. Sarah Chen7 min read

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77/100

Microbiome Testing: What It Can (and Can't) Tell You About Your Longevity

Your gut microbiome influences immunity, metabolism, inflammation, and even cognition. Microbiome testing has arrived at consumer level — but what does it actually tell you, and what should you do with the data?

8 min readRead article

91/100

DEXA Scan for Body Composition: The Most Important Test Most People Skip

DEXA scanning measures muscle mass, bone density, and visceral fat with clinical precision. It's the body composition test Peter Attia calls essential. Here's what to measure, how often, and what the numbers mean.

8 min readRead article

89/100

Epigenetic Age Testing: Biological Age Clocks Explained (DunedinPACE, Horvath, TruAge)

Your chronological age is fixed. Your biological age is not. Epigenetic clocks now measure it with remarkable precision. Here's how they work, which test to buy, and what to do with the results.

7 min readRead article

94/100

HRV Guide: What Your Heart Rate Variability Score Actually Means

HRV is the most sensitive daily biomarker available. Learn what it measures, what good looks like for your age, and exactly how to improve it.

6 min readRead article

96/100

VO2 Max Testing: The Single Best Predictor of Longevity You Can Measure

VO2 max is the strongest independent predictor of all-cause mortality. Learn what it is, how to test it, and exactly how to improve it.

6 min readRead article

92/100

Best At-Home Blood Tests for Longevity: Ranked by Biomarker Depth

We compared 8 at-home blood testing services on biomarker coverage, accuracy, turnaround, and actionability. These are the panels worth ordering.

4 min readRead article

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CGM Guide for Non-Diabetics: What Your Glucose Data Actually Means

A complete guide to interpreting continuous glucose monitor data for longevity and metabolic health — what metrics matter, what's normal, and what to do about spikes.

3 min readRead article