Your biological age is the real age of your body: of your arteries, your metabolism, your cells. It does not always match the age on your passport, and that is good news, because unlike your chronological age you can act on it. Enter the values from your latest blood test and you get an estimate in seconds, calculated with the Bortz method, a model validated on more than 300,000 people. Understand the method.

i

No blood test to hand? Just enter your age for a first estimate. Every value you add sharpens the result , nothing is required.

Essentials

6 high-impact markers
⚕️ Disclaimer: an informational and educational tool. It makes no diagnosis and does not replace medical advice. An “optimal” value is a point of balance, not an extreme. Have your results interpreted by a healthcare professional.

Expected units: those of the UK Biobank (shown under each field). If your lab reports US units, convert first: HbA1c from %, glucose and total cholesterol from mg/dL, creatinine from mg/dL, albumin from g/dL, vitamin D from ng/mL. Each field shows its own conversion.

The health letter

A weekly dose of informed health.

Every Thursday morning, a plain, useful newsletter: 1 key deep dive, 3 articles to read, 1 practical tip.

FREE Sign-up bonus: our booklet “The Circle of Lasting Habits”, sent to you by email straight away.
Unsubscribe in 1 click Data protected, never sold No spam
Get the weekly health letter