3:03

Dr. Mark Hyman explains how gene expression, not fixed DNA, controls aging and disease. Environmental factors like food, toxins, and community shape which genes turn on or off. He describes a patient named George who reversed multiple illnesses and lost significant weight by changing these inputs.

Questions this video answers

About 2,500 ("instead of like 20 blood tests, there was 2,500 blood tests I had measured").

George started at 300 pounds and age 63, lost 150 pounds in a year; his multiple diseases resolved (heart failure, diabetes, angina, reflux, prostate problems, erectile dysfunction, sinus issues).

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