Evidence-based guides on biological age, longevity and daily habits.
5 min · movement
10,000 steps was a marketing number. The evidence points to a lower threshold.
5 min · metabolism
What the 'metabolic age' on a smart scale actually measures — and how to move it.
6 min · no-device
You can follow your body age without wearing anything. The logic, limits and strengths of device-free tracking.
5 min · sleep
Sleep is the fastest-acting variable on biological age — and regularity often matters more than total hours.
6 min · guide
Lab-based and lab-free ways to estimate body age, including four functional tests you can do at home.
6 min · longevity
Longevity is not about living longer alone — it is about extending the years you feel good. Here are the evidence-based foundations.
7 min · longevity
Your birth year is fixed. The age of your body is not. Here is what biological age actually measures and how daily habits move it.
