In fact, the best, fastest, most fundamental, healthiest, safest, most environmentally friendly, most complete, most harmless and without any side effects way to lose weight is to control the diet reasonably: 1. Control calories and fat. Always be careful with the calories of food, in the meal should reduce some fatty meat, increase some fish and poultry. 2, the diet should be light. To eat less salt, the more you eat salty things, the more you want to eat. Eat less food that is processed with sauce, these things are rich in sugar, salt and flour, it will increase your calories. 3, often eat fruits and vegetables. To eat a moderate amount of fruits, vegetables and whole wheat bread containing more fiber. 4.Balanced meals. Every day according to the plan of a balanced arrangement of their own diet, while paying attention to regular, not indiscriminate eating. To slow down the time to eat, eat a meal of at least 20 minutes. 5.Calorie negative balance. Please lose weight principle: calorie intake must be less than your consumption. 6, the will to determine the effect and quality of weight loss. 7, such as at the same time suffering from such as high blood pressure, hypertension, fatty liver, sleep apnea syndrome, diabetes and other obesity concomitant disease, it is recommended that such people as early as possible for weight loss surgery, not only to maintain long-term weight loss, but also to effectively treat a variety of obesity concomitant disease. However, not every large base population is suitable for bariatric surgery. According to the Chinese Guidelines for the Surgical Treatment of Obesity (2007), those who meet any one of the first three items and have the fourth item can undergo bariatric surgery: 1. BMI≥32kgm2 2. apnea syndrome, hyperlipidemia, etc., and the predicted weight loss is effective. 3, waist circumference: men ≥ 90cm, women ≥ 85cm; dyslipidemia. 4, Other: no alcohol or drug dependence, no serious mental and intellectual impairment; other weight loss methods are ineffective or intolerable; 16-65 years old; understanding and acceptance of surgery and post-operative lifestyle changes.