My first fast I was cold everday after the 10th (I went 21). And strangely enough I stopped sweating during my cardio workouts (I sweat a lot, so this was unusual). I did a Liver-Flush about 1 month later. So far on this fast I have only been cold on one day (I'm on day 25) and I am still sweating during my workouts - profusely! I thought it was a metabolism thing, but if it's related to my liver, then it would seem the flush did me some good. :^)
I am planning another Liver-Flush at the end of this one (Day 30).