How much weight will a 214 pound 5' 8 16-year-old girl lose if she fasts for 7 days?

EVERY PERSON WILL LOSE A DIFFERENT AMOUNT OF WEIGHT BECAUSE EACH PERSON'S BODY RESPONDS DIFFERENTLY TO DIFFERENT STRESSORS. Not as much weight as she'll gain back once she stops starving herself. When you fast, your body compensates by slowing down its metabolism in order to conserve energy. This will continue for some time even after you begin eating again. I have heard that but the funny thing is I am 20 years old 5'9 and used to weight 190 and I went into depression and didn't eat a whole lot and I lost 45 lbs and kept it off for a year and a half and i ate anything and everything and I am just barely gaining it back now and only like 15 lbs.... but like you said everybodys body is different I just know mine didnt go into starvation mode. Not that I am saying you should do that it wasn't a good idea and there are a lot of healthier ways to losing weight. I suggest weight watchers. That is really good and it really does become a way of life. You start to look at everything as points.