15 years old is not recommended to lose weight through diet! 15 years old is in the developmental stage, and nutrition must be guaranteed! It is recommended to eat more meat and vegetables, staple food (rice, steamed bread, etc. ) can be reduced in moderation, not too much! The best way is to exercise more, play basketball, play football and so on! Exercise for at least half an hour every day, and you can do push-ups, sit-ups and jump rope at home!