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.

Longevity Intel Editors7 min read

Read article

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

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 many longevity physicians call essential. Here's what to measure, how often, and what the numbers mean.

8 min readRead article

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

HRV Guide: How to Interpret Heart Rate Variability Without Overreading It

A source-linked guide to RMSSD, wearable measurement limits, personal baselines, and when HRV should—and should not—change a decision.

5 min readRead article

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

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

A research-based comparison of at-home blood testing services by biomarker coverage, price, and physician support, drawn from company published information.

4 min readRead article

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

Related tools for diagnostics

Best longevity labsWhat to order first Biomarker guideWhat each number means At-home blood testsPanels compared Beginner pathTest before you stack