Certain foods. Water, organic vegetable broth, green leafy vegetables, natural pickles, apples are great to fill you up so you dont feel hungry and they are very low in calories.
Yes and no. Homeopathic remedies stimulate your own healing mechanisms in the specific way needed for your system to find its own balance again. A remedy that's based on your entire individual makeup can help you naturally pursue healthier things -- good diet, exercise, rest, etc. Until 12/11 there was so-called "homeopathic" HCG, but this isn't true homeopathy. 500 cal/day diet was required also.