The goal dietary nutritional
composition varied across the studies, with carbohydrate consumption ranging from 4% to 45% (weighted mean,
23%) of energy intake in the low-carbohydrate group and fat
ranging from 10% to 30% (weighted mean, 26%) of energy
intake in the low-fat group. Self-reported mean energy intake
weighted by trial sample sizes was similar for both diets at
approximately 2,000 kcal.