Mine was prescription drugs. After I had my 1st baby 9 years ago, I went on Depo-Provera right away along with Zoloft. I was on the depo for 1 year, but was on the Zoloft for 6 years. My weight, no matter what I did, just kept climbing. 3 years ago I stopped taking it when my mother died, and it took a year after that before my body was able to "normalize". I had also quit smoking, but got pregnant during that time and gained 55lbs with the pregnancy. Thank goodness I'm almost at the end of my tunnel!!