In brief: different diets.
D004038:Diet, Reducing; D004040:Dietary Carbohydrates; D004041:Dietary Fats; D004044:Dietary Proteins; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D015431:Weight Loss
D004040:Dietary Carbohydrates; D004041:Dietary Fats; D004044:Dietary Proteins