11. Your medications
Some medications taken to control or prevent depression, diabetes, hypertension and unwanted pregnancy can cause weight gain. Use of psychotropic medications, particularly anti-depressants, in the United States increased by about 5 percent between 1988 and 2002, according to a 2009 study in the journal Critical Reviews in Food Science and Nutrition. Hypertension drugs called beta-blockers have been linked to weight gain, as have treatments for Type 2 diabetes.