Starving, or fasting yourself, as it's called, has too many problems to count. There can be health risks such nas stomach or headache, fatigue, pain, feeling ill and energy-less, and even if miraculously you don't have these symptoms, there is a risk of shock, coma, or heart irregularities. And once you resume eating again, your stomach is loaded with enzymes and hormones that make almost every bit of food you take in to be stored as fat. This happens when your body goes into "starvation mode", which is when you consume less than 1,200 calories daily. Even if you didn't gain it all as fat, once you resumed eating as you did before you're just going to gain it back because you're going to do the same things that made you gain weight in the first place.. The safe way to do it is to eat HEALTHY (and not nescessarily diet, just eat about 2,000-2,200 calories a day [because teens need a little more than 2,000]) and excercise. So, excercise, eat healthy, and eat enough, no more no less. I hope I convinced you and you stop this method quickly. Good luck with losing weight (healthily!) ^_^