How about just a good diet and exercise. Them diet pills don't do shit for you, but give you this mental though in your head thinking that it works that great. Photoshop can go a long ways on tv.
Diet cardio and exercise is number one thing she should be doing, there is no magic pill that is going to make her lose weight. That being said a good burner like forged burner or n2burn that will compliment a good regimen though.