I had done this before unsuccessfully. I lasted two whole days, but then ate A LOT on the third day. By no means was it the Master Cleanse fault. I just didn’t pick the right day to start. My father was having a party (I know, he’s forty and he still has parties, lol:) and I HAD to eat something.
Anyway, that ruined the whole Cleanse. But I’m starting again tomorrow, this time trying to actually get PAST at least 3 days.
Good luck all! :)