Dr. Chris Knobbe links the surge in chronic diseases—like obesity and diabetes—to the rise of seed oil consumption. From 1922–1987, obesity rose 600% while seed oil intake jumped from 78 to 497 calories/day. Seed oils damage metabolism, promote inflammation, and are nutrient-poor. Once used as machine oil, they now make up ⅓ of U.S. calories. To avoid them: skip packaged foods, eat whole foods, and cook with healthy fats like butter or olive oil.