Cancer, obesity, diabetes, and neurodegeneration are climbing—striking earlier than ever. Our genes didn’t suddenly change; our nutrition did. For decades, powerful industry interests have shaped “healthy” guidelines that favor ultra-processed products, low fiber, and a constant churn of snacks, shakes, and supplements. The result is a weakened gut, chronic inflammation, and chronically high insulin. This series busts the biggest myths and replaces them with first principles: Rough It®—make your gut work; favor low-calorie-density foods with abundant indigestible roughage; keep insulin rises gradual and low; and nourish yourself with complete, balanced, unprocessed food. Start here to separate marketing from biology—and build real, durable health.