8: Mayo Clinic diet
Developed by the well-known research group in Rochester, Minnesota, this diet is all about breaking bad habits and replacing them with good habits. For example, a person might ban eating in front of the TV and snack only on fruits and vegetables. In the first part of the diet, which lasts two weeks, you may lose 6-10 pounds because of the new habits, the diet claims. The diet comes with its own food pyramid that puts fruits and vegetables at the bottom.
[Photo via @alphafoodie]