A new comparison of multi-national data reveals that highly-educated women have a healthier average weight than less-educated women. In countries where malnutrition is prevalent, better-educated women weigh more. But in wealthier countries — with rapidly growing rates of obesity — better-educated women weigh less. The United States was the only nation surveyed in which better-educated men were skinnier than less-educated men. In every other country, the average male body mass increased with every additional year of schooling.