I just came off of an 18 day Master-Cleanse and I originally wanted to do 20 days. I also got to the saturation point with the lemonade that I was only drinking 4 glasses a day and nothing else...I felt it was time to stop. You also have to realize that it takes at least three days after the fast to acclimate your system to eat food, so now it's day 21 and tonight was the first night that I actually ate some vegis.