Yes, I would stay away from any protein or weight gainer supplements, eat lean meats like Chicken breast, rice and veggies , fish, and keep up a busy workout schedule and you will be in fighting shape in no time at all. , stay away from diet soda, I mean you can have a few but don‘t go crazy as it has lost of salt and will bloat you up. Plus some studies find that artificial sweeteners inhibit metabolism (the burning of fat)- Good luck