For weight control purposes, the body does not care whether a larger percentage of daily calories come from complex carbs, or from protein, provided caloric intake matches energy expenditure. The advantage of a high protein diet is clearly that - unlike fat or carbohydrates - protein is not as readily converted to fat. There is also its superior satiety, particularly for those who do not have the resources to nutritionally fine-tune their body, which might otherwise achieve a similar satiety with high complex carb diets, as with high protein ones... Full Text