One such study, conducted by Kekwick and Pawan, compared three groups put on calorically equal (isocaloric) semistarvation diets of 90% fat, 90% protein, or 90% carbohydrate. Though ensuring compliance was a challenge, the outcomes were clearly not at all the same: 1,000 cals. at 90% fat = weight loss of 0.9 lbs. per day 1,000 cals. at 90% protein = weight loss of 0.6 lbs. per day 1,000 cals. at 90% carbohydrate = weight gain of 0.24 lbs. per day
