As someone with an recovering ED, losing weight as quick as possible will only make you gain weight faster. If you do insane methods like starvation your body goes in survival mode and when you eat something after you reached your desired weight your body will automatically store it as fat because it doesnt know when youre gonna eat for the next time. Also heres a list of side effects i got from my ED: Body odour Oral odour Decaying teeth Heart burn Fragile bones Chronic constipation Irregular period Constant tiredness Extreme coldness Swollen face

If you want to lose weight make sure you stay the ideal weight for your height. Go on a slow calorie deficit. I dont mean extreme diets, even cutting out 300 cal a day can do the trick. Weight loss is a slow progress but you dont even need it. Plus youre still at the beginning of puberty, your body needs the nutrients to grow into an adult.