Weight loss to three months for the following reasons: First, weight loss to have a safe speed, not to lose too fast. From the current perspective, it is relatively safe to lose 0.25-0.5kg per week. If the speed of weight loss is too fast will lead to too intense biochemical metabolism in the body, will produce a large number of metabolic products accumulation in the body and cause harm to the body. Second, it takes three months to lose weight, mainly to promote the dieter to develop a good lifestyle, because the essence of weight loss is to achieve the establishment of a good lifestyle in all aspects of diet, exercise, sleep, emotions and so on. If the time is too short, it is not easy to develop good habits. After three months of being able to establish a whole set of good lifestyles, it is more beneficial to promote health while losing weight.