THE FREE LONGEVITY STARTER GUIDE
Longevity science, delivered to your inbox.
The evidence-based basics that actually move the needle, plus a weekly letter on what I’m testing and what the research really says. Join 300,000+ women.
WHAT'S INSIDE
01 · TEST
The labs to actually run
The exact panels and optimal ranges I track, so you know your real starting point instead of guessing.
02 · BUILD
The daily foundations
Sleep, muscle, nutrition, and stress, the handful of basics that outperform every supplement stack.
03 · CYCLE
Optimize your hormones
How to train, eat, and recover to optimize your hormones, so your protocol fits your body.
04 · STAY CURRENT
A weekly letter
Every week, what I’m testing and the up-to-date longevity science worth your attention, in plain language.
MEDICAL DISCLAIMER
The content on this site is for educational and informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or another qualified health provider with any questions about a medical condition or before making changes to your health, supplement, or exercise routine.
© 2026 KAYLA BARNES-LENTZ