A closer look

When an epidemic of dermatitis, diarrhea, and dementia swept the American South, the medical elite immediately blamed poor hygiene and infectious germs. Dr. Joseph Goldberger had to literally eat the scabs and feces of infected patients to prove it wasn't contagious. The real culprit? A sheer lack of niacin (Vitamin B3) caused by poverty diets consisting entirely of cheap cornmeal. The government ignored him for decades because admitting starvation was bad for politics.