Summary
Episode exploring how behaviors can alter gene expression through epigenetic mechanisms, with practical interventions for optimizing genetic health.
Key Points
- Behaviors influence gene expression
- Epigenetics bridges nature and nurture
- Exercise affects gene methylation
- Diet impacts epigenetic markers
- Stress alters gene expression
- Lifestyle interventions are powerful
Key Moments
Dive reflex and the spleen: how cold water face immersion deploys extra red blood cells
Sea-diving populations evolved larger spleens and higher red blood cell counts via thyroid hormone gene variants. The dive reflex (cold water on face + breath hold) triggers spleen contraction, releasing stored red blood cells.
"This is like an erythropoietin independent mechanism of increasing your red blood cell count that could have an advantage in performance."
