I tried the Master Cleanse and it was an interesting week. I debated back and forth at the time between doing a juice feast (which would require a juicer) and the Master Cleanse. So, I picked the Master Cleanse and the whole thing was a disaster for me. I felt horrible, absolutely horrible...when I felt like I was going to pass out, was shaky, super dizzy, I quit it and opted for a juice feast. You are basically just drinking lemonade and then flushing out your body with a salt flush. You are not getting all the nutrients you need and the high you feel is from the lack of food a euphoria experience. What bothered me is the guy who advocates it, in fact he wrote the newer books on it, he keeps his weight in check by doing several of these a year and he was talking about doing these for more than a month. Now, call me a crazy gal, but no way is that healthy. Another thing that bothered me was he said that he could feel the toxins when he went to the bathroom.."burning" him. That is the cayenne! lol
So, I did it, had a bad experience and then went and did a juice feast for 30 days until I became saturated and couldn't do the green juices lol. Making my own juice, which I still do, was way better for me. Total life changing experience, but I wouldn't ever do a cleanse or juice feast like that again. If I want a spiritual or cleansing experience i'll just drink a smoothie or more homemade juice.
As with anything though, there are people who use the juice feast method to loose all their weight. They will even do it for 90 days or more. I'm not into that aspect of it. I did the feast for an experience at the start of my weight loss journey and it was a lot of work, a lot of veggies and fruits juiced...much more involved.
I know some people have had wonderful experiences on the Master Cleanse, but I can tell you that after doing a lot of research before and after there are an even amount of people that like me do not support that idea, but one can say the same for a juice feast probably as well.
The lemonade drink wasn't bad either...I did read about a guy who did the Master Cleanse for over 100 days...I believe he had serious health issues afterward, according to his blog and video journals at the time. I don't think most people do that sort of cleanse for more than two weeks though...a juice feast can last longer, but I personally feel like I needed that experience at the time, but not now. I did try to do a short juice feast this year, but lol...my body remembers the green juices. Just smelling and looking at it made my body go "NOOOOOOOOO" and well..that was that! lol