Classic studies in nutritional epidemiology . . . Epidemiology is the study of the occurrence of human diseases.
Nutritional epidemiology focuses on the relationship between our diet and our health.
Much later, it was found that vitamin C deficiency was the cause. He adds milk and vegetables to their diet and eliminates the disease. Joseph Goldberger's tracing of pellagra among poor, corn-dependent people in the Southern states to a dietary deficiency in 1915.