I've done a week long water fast, just to see what would happen. (Juice fasting is for pussies) You're better off doing a protein fast, so you don't lose as much muscle.
Anyway, the fast went roughly like this:
Day 1) No issues, lost a couple of lb water weight.
Day 2) Felt quite hungry, lost another couple of lb water weight. The term water weight could also be substituted for "shit in my colon". It takes between 2-3 days for your colon to clear itself.
Day 3) Mostly stopped shitting, drank a fuckload of water to avoid hunger pains
Day 4) Started losing around 1.5lbs of fat per day. Shit turned to liquid and was mild yellow.
Day 5) Started to get majorly pissed off. We're talking 24/7 angry for no reason
Day 6) Would have stabbed someone for a bite of food
Day 7) Quite literally delirious all day long, not to mention angry. Pretty sure after a few more days the angry would have disappeared, and I would have just been zoned out of reality
After my colon was filled up again, I had lost around 6lbs total. My skin cleared up, and I shit you not, a small wart on my hand disappeared - totally gone.
So here are my conclusions. The bulk of the benefit from a fast comes from your digestive system basically shutting down. Juice cleanses and all that shit don't really allow your digestive system to shut down, so they are mostly a waste of time (and muscle). Shutting down your digestive system gives your body a chance to focus on healing other shit, kind of like an extended sleep.
Considering that you have 2-3 days of shit in your colon, a cleanse of it is utterly pointless on all levels. Sticking shit up your ass daily is an easy way to upset your anus and get hemorrhoids
OP is retarded for paying to do a half assed fast and sticking shit up his own ass..