Guides on blood testing, biomarkers & longevity.
Clear, practical explainers to help you read your labs, understand what each marker means, and act on the numbers — grounded in published research.
What drives your PhenoAge
PhenoAge turns nine routine blood markers plus your age into a single biological-age number. Here's what each marker measures and what moves your score.
How to get a blood test in the US
Direct-to-consumer labs, what to order, and how to read the requisition — without a doctor's visit.
How to get a blood test in Canada
Public vs. private options, requisition-free panels, and getting a copy of your own results.
What drives your PhenoAge
PhenoAge turns nine routine blood markers plus your age into a single biological-age number. Here's what each marker measures and what moves your score.
PhenoAge vs KDM: two ways to measure aging
Two peer-reviewed methods, two philosophies. When each is useful and how they differ.
The markers that matter most for longevity
A shortlist of the blood markers most tightly linked to healthy aging — and why they earn the attention.
How to optimize your blood results
The levers that reliably move markers in the right direction — sleep, movement, nutrition and more.
No guides in this category yet — check back soon.