I'm a big fan of fasting too, although I've really struggled recently to commit to a fast. I have however done quite a few 24 hou, 3 day and a 5 dayr water fasts, many 7 day juice fasts and in 2012 I did a 41 day mostly water fast (with a little honey and ginger and radis and spinage juice sometimes. I found it gave me huge inspiration and promoted me to open a healing centre.
RE: Prolonged