The Lemonade diet..?

I read that it's a detox diet and you will lose a lot of weight but gain half of it back when you start eating normally. I also read in Jared Letos biography that he had to gain 67 pounds for a movie role and than lost 20 pounds in 10 days by doing the Lemonade diet. What I want to know is how he managed to keep the weight off?

: http://alcoholdrugstreatment.info/the-lemonade-diet