Around 1980, obesity rates began rising sharply after decades of stability. Research by Cutler documents multiple converging changes: high-fructose corn syrup, low-fat dietary guidelines (increasing carbs), processed food explosion, portion inflation, increased eating frequency. Human genetics didn’t change — the environment did. No single factor caused the epidemic; the combination created an obesogenic environment our bodies weren’t designed for.
This companion covers the timeline and what changed. (3 min read)
Written by AI, directed and approved by me. How this is made →