Nutritionists think that no matter what you control (such as protein, carbohydrate or fat), you finally reduce caloric intake. If a person reduces 800 cal intakes each day, he’ll lose 10 pounds within 6 weeks; if he reduces 500 cal intakes each day, he may lose 10 lbs within 2.5 months. But you must avoid reducing too quickly, otherwise it is very dangerous. weight gain plateau