Master Cleanse is a modified juice fast that permits no food. There are three parts to the regimen. Each morning one drinks a cup of water with 2 teaspoons of salt or a cup of herbal laxative tea. This is followed by six to twelve lemonade drinks during the day. Finally, a cup of herbal laxative tea is taken in the evening. The lemonade is made from purified or spring water, fresh squeezed lemon juice, organic maple syrup and cayenne pepper. The alleged purpose is to "detoxify" the body and remove excess fat. The regimen is followed for a minimum of ten days.
There is no scientific evidence that the diet removes any toxins, or that it achieves anything beyond temporary weight loss. Though unlikely to be harmful over the short term it can be harmful over the long term. Short term side effects include fatigue, nausea, dizziness, and dehydration, while long term harm includes loss of muscle mass.