You are only 14 years old. You must never take diet pills. I am 2 1 year old now. I also went crazy on diet pills in high school. It was light, but it soon bounced back. This year, I made up my mind to lose weight. I lost weight 18 kg in the first half of the semester (although I am still a little fat now). I'll tell you the method I used myself.

Breakfast: add an egg (or vegetarian steamed stuffed bun) to a bowl of millet porridge, and eat a cucumber if it is not enough.

Lunch: I just eat half the dishes at school and choose something that looks greasy and light in the cafeteria. You can drink a cup of boiled water before eating, which is easy to feel full. I recommend you to eat spinach and celery, which are low in calories and can help defecate.

Dinner: You can eat a tomato or an apple at first, but you don't have to eat it when you get used to it.

The above is diet. The important thing is that I jump rope with my classmates in the dormitory every night. Jump 1000 times a day at first, and then it can be gradually increased to 2000 times. Just control yourself and don't make yourself too tired. Take your time. Exercise for more than 30 minutes to consume fat. If you don't like skipping rope, you can go for a walk, and you can only walk for more than an hour.

These are my real experiences. I was really persevering when I remembered it.

You'd better find a partner to lose weight with. Lose weight with roommates, and they urge each other.

It is not difficult to lose weight, but you must have perseverance, otherwise you will lose all your efforts. Summer vacation is a good time to lose weight. I hope you succeed. I will continue to lose weight this summer vacation, haha. I hope we are all slim when school starts.

Sorry, I didn't realize you were a boy just now. If you have, you can eat more. After eating, you don't feel hungry but don't support it.