I juice fasted for 15 days and I was cold a lot of the time I would swig on longevity spices throughout the day and at night I wore track pants and a long sleeved shirt plus a water bottle and I never wear pajamas.
I wasn't used to being so cold, i felt like a little old lady with the heat cranked to 90 degrees. The first night I broke the fast it was back to no bed clothes and toasty warm. Very curious.