For girls with 12 and 13, I suggest not to lose weight deliberately, because this is the time to grow up, so just pay attention to the following points.

1. Watch your diet. Don't eat spicy, fried, high-calorie, cool and high-sugar food, but eat more fruits and vegetables.

2. Exercise more. Make a schedule for yourself and exercise according to the requirements on the schedule every day. After a long time, you lose weight.

3. Drink plenty of water.

4, do not stay up late, develop a good habit of going to bed early and getting up early.