If you look on the internet with the true master cleanse diet this is all you are supposed to drink (no food) for a minimum of 10 days. It does clean out your system, but you then have to gradually introduce food to it again. People have lost up to 20 pounds on this system. You can also do it another way by eating light as in your fruits and vegetables but you don't have to do without food.
This is great cold or hot. You can also warm it and then stick a green tea teabag in it. This is especailly good for your liver. Yes if you don't eat you'll pull out more "stuff" as in toxins out of your cells but also your body has to be strong enough that once the toxins get pulled to get rid of it.
If you do think you are strong enough to do the full diet all you have to do is drink only the tonic, as in several times a day in place of food, and at night you need to drink a senna (laxitive) tea. You do this for a 10 day minimum. When you get back on food you need to introduce it s-l-o-w-l-y.