On May 6, 1944, the Journal of the American Medical Association cited a study on the effect of what would become known as the “Rice Diet” on treating heart disease. Walter Kempner of Duke University presented the results at an AMA conference later that year.
Kempner documented decreases in heart size, improved kidney function and a reversal of high blood pressure when patients ate a diet limited to rice and fruit. The prescribed diet contained only 50 milligrams of sodium and limited its calories from fat and protein to less than 5 percent each.