You know what happens when someone discusses a study like Grey & Kipnis in low carb circles? Almost invariably someone will refer to the 1500 cal/day diet given to three of the subjects as a "starvation diet". This designation seems to trace to the Minnesota Starvation Experiment.
The MSE was done in the mid-40's on men. Men who, at that time, maintained on 3200 calorie mixed diet. They took these men and cut their intake roughly in half to 1560 calories. (Can you say Biggest Loser?). But they did something else. Their 1560 calories were composed of potatoes, rutabagas, turnips, bread and macaroni. A very high carb and likely very low fat and protein diet. And unless most of this was potatoes, not complete protein at that. I'd imagine almost 6 months eating such a nutrient deficient diet would indeed be starvation for anyone.
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