I am COLD!!! I am a believer that it is the loss of Grehlin (SP?). I still have over 120 lbs to lose so I know I still have adequate fat insulation. I was one of those always extra hot people. Never using a jacket in winter, only sleeping with a sheet, A/C temp kept at 68 degrees, sweating all the time.
One other explanation to no longer being hot is that my blood pressure is now normal after losing these 87 lbs. But that dont explain the extreme coldness I feel. I now sit with a heating pad, wear a sweater, use throw blankets, and sleep with an electric blanket. That being said, I would not trade this for not having surgery.