Wearables·6 min read
HRV on your watch: what it measures and when to act on it
HRV swings tens of percent from one morning to the next. What the number reflects, why a single reading tells you little, and what to do with it.
August 1, 2026
Blog
Research on nutrition, lab markers and wearable data — with links to the original studies.
Lab markers·4 min read
ApoB vs LDL cholesterol: which number measures your actual risk
LDL cholesterol measures mass; apoB counts particles. Why the two disagree, when a normal LDL-C reassures you for the wrong reason, and what apoB values European guidelines name.
July 25, 2026