hiim 17 and last year did slimming world for 3 months. I lost 1 stone but then over GCSE's I put it all back on which is expected. slimming world is great because you can still have bread and dairy and stuff just in moderation. its also good becuase you go to a group and get a book with loads of tips and stuff. also getting excersise is really important. the people who ran or swam or went to the gym were alsways better than those who didnt. hope that helped at all.