What If Your Daily Habits Could Rewrite Your DNA? episode artwork

EPISODE · Aug 12, 2026 · 21 MIN

What If Your Daily Habits Could Rewrite Your DNA?

from The Habit Healers · host Laurie Marbas, MD, MBA

Your DNA is not your destiny. In this episode I break down the science of epigenetics: how DNA methylation switches your genes on and off, why your daily habits appear to influence your biological age more than your body weight does, and what that means for you starting today.Every cell in your body carries the same 20,000 genes. A skin cell and a neuron are built from identical instructions. What makes them different is which genes are being read, and that reading pattern stays responsive for your entire life. I walk you through how methyl groups and histone tags open and close your genes, what happens inside a muscle cell within hours of a single workout, and the remarkable finding that your muscles retain an epigenetic memory of training you did months ago. We also look at sirtuins and NAD+, the enzyme system that links movement and energy stress to gene expression and declines as we age. Then I give you the two week reset protocol built from this research, with a printable worksheet.What you’ll learn:* How DNA methylation and histone modification control gene expression without changing your genetic code* Why one session of exercise measurably shifts methylation at metabolic genes* What epigenetic muscle memory means for getting back in shape after a break* How sirtuins and NAD+ connect movement and aging to the same molecular switch* What the epigenetic clock is and how a pilot trial moved biological age in eight weeks* The methyl donor and polyphenol foods that supply the raw materials for methylationDr. Marbas Substack Article: https://drlauriemarbas.substack.com/p/what-if-your-daily-habits-could-rewriteCheck out the Habit Healers Community: https://www.skool.com/habithealers/about Get full access to The Habit Healers at drlauriemarbas.substack.com/subscribe

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