Hi, I'm on day 32 and plan to go to 40 or so days of my first fast.
I'm quite a bit colder and wear my camping clothes including hats in the house as well as polypro longjohns at work. Hot showers are a revelation. What i understand is that a lot of our body heat comes from muscle activity and "metabolism". I was surprised but I don't know why to find that the metabolism is mostly digestion. No digestion; no heat. Surprising to me how much energy I had been using to digest the food that I was over-eating! When I'm cold I tell myself that that is just one less calorie of waste.