Im sorry, but thats sounds so unreasonable. Your 125 lbs? thats a perfect weight, - a perfect wieght-, unless ur unsually short, like a midget, but since i don't think thats the case, its a awesome wieght at a perfect age. Losing that much weight will ravage your body, and don't think just cuz im 16 i don't know anything, believe me, if you lose that much weight, which will bring you to 100 lbs, you'll be checking into a hospital rather than new clothes. I know you might think, "o-that can never happen to me. I wouldn't do that, or take it that far." well thats bull, cuz thats the way it always starts, and then it does get too far. Work on muscles or toning or something, but not losing wieght.