The notion that soy-protein rich foods can aid in weight loss was disproved recently, after a study of 75 women found that those who ate foods rich in soy protein didn't lose any more weight on a low calorie diet than those who didn't.

Though eating the food itself didn't promote weight loss, soy is a protein and a low-glycemic food. These two factors, which help keep blood sugar levels stable and keep a person feeling full longer, may be part of the reason soy has been touted as a weight loss food. In addition, soy helped lower insulin levels and "bad" cholesterol as well, and some studies show it may help prevent heart disease.

So enjoy soy as part of a varied and balanced diet, but if you're eating it solely to lose weight, you may not get the results you were looking for!