Re: Bile Minerals in Unine equal Kidney Stones?

Sounds like your kidneys were changing out their lining. Lots of red blood cells and material are used in the filtering sections of the kidneys, and during a fast, the liver and the kidneys are permitted to regenerate their cells.

http://fastingdry.blogspot.dk/p/what-is-dry-fasting.html This one explains some of the processes going on during fasting, a bit clearer on business in the kidneys. :)