Kempner’s kidney patients went on a sugar and rice diet and lost weight:
Sugar Does Not Make People Fat, Case-In-Point: Kempner’s Rice And Sugar Diet
Cubans, during their Special Period, ate primarily sugar and rice for energy and lost weight. Their rates of diabetes, heart disease, and cancer also went down:
Impact of Energy Intake, Physical Activity, and Population-wide Weight Loss on Cardiovascular Disease and Diabetes Mortality in Cuba, 1980–2005, American Journal of Epidemiology, 2007
Diet composition in Cuba also changed during the study period. By 1993, carbohydrate, fat, and protein contributed 77 percent, 13 percent, and 10 percent of total energy, respectively, whereas in 1980 their respective contributions were 65 percent, 20 percent, and 15 percent. The primary sources of energy during the crisis were sugar cane and rice.