What is the recommended amount of dietary protein for adult humans?
Low-protein diet
Low-protein diets to treat kidney disease include the Rice diet, which was started by Walter Kempner at Duke University in 1939. This diet was a daily ration of 2,000 Calories consisting of moderate amounts of boiled rice, sucrose and dextrose, and a restricted range of fruit, supplemented with vitamins. Sodium and chloride where restricted to 150mg and 200mg respectively. It showed remarkable effects on control of edema and hypertension.[25][26]  Although the Rice diet was designed to treat kidney and vascular disease, the large weight loss associated with the diet led to a vogue in its use for weight loss which lasted for more than 70 years. The Rice Diet program closed in 2013.[27] Other low-protein starch-based diets like John A. McDougall's program continue to be offered for kidney disease and hypertension.