Cleanses typically involve drinking anywhere from six to 12 glasses of fruit and vegetable juice per day. Depending on your goals and your willpower, they can last anywhere from a day to a month.
Most cleanses are staunchly liquids-only, but some, like the Clean Program, also incorporate a very carefully curated list of acceptable solid foods. While itâ€™s clearly likely that consuming nothing but eight glasses of pulverized kale and jicama per day will cause you to lose weight, weight loss is typically not the ultimate goal of cleanses. Rather, advocates say cleanses â€œdetoxifyâ€ the body and promote healthy immune systems.
The jury is out on the efficacy of the juice fast for detoxification. Most doctors believe that the bowel is already self-regulating and needs no assistance from liquefied beets. In addition, many cleanses are high in sugar (blame all that fruit) and even potentially dangerous to diabetics and pre-diabetics.