About teenagers' weight loss: Due to the physical growth and development of teenagers, it is suggested to have a reasonable diet and exercise. On the premise of ensuring nutrition, cereals, fruits, vegetables and dairy products with high protein and fiber should be the main ones: 1. Breakfast: Choose soybean milk, milk, oats, whole wheat bread and cereal. An egg and fruit. 2. Lunch: a vegetarian dish+meat dish. Try to choose a high-protein fish cooking method. 3. Dinner: lunch 1/2+ vegetarian. Attention: Reduce the intake of high-calorie and high-fat foods such as snacks (cakes, desserts and cold drinks). If you don't eat it, it is not recommended to eat it in the morning. About exercise: It is recommended to exercise more than 3 times a week.