Dr. McDougall delivers a powerful lecture on heart disease, emphasizing the only truly effective way to prevent and reverse it—a low-fat, starch-based diet. While stents and bypass surgery address old, non-lethal scar tissue, the real danger lies in tiny, undetectable pustules that trigger heart attacks. These can’t be identified by medical scans or tests, but they can be managed and prevented through a low-fat, whole-food, starch-based diet.