Detox diets vary. Most involve some version of a fast: that is, giving up food for a couple of days and then gradually reintroducing certain foods into the diet. Many of these diets also encourage people to have colonic irrigation or enemas to "clean out" the colon. (An enema flushes out the rectum and colon using water.) Others recommend that you take special teas or supplements to help the "purification" process.
While there are medical conditions that interfere with organ function and prevent the body from clearing toxins, healthy people already have a built-in detoxification system — the liver, kidneys, lungs and skin, says Moloo.
Eat Right and Your Body Does the Rest.
While believers claim they feel lighter and more energetic, studies on starvation show the longer you fast, the more lethargic and less focused you become. Because most of these diets contain very little protein, it can be difficult for the body to rebuild lost muscle tissue.
Of course, it's a great idea to eat lots of fruits and veggies, get lots of fiber, and drink water. But you also need to make sure you're getting all of the nutrients you need from other foods, including protein (from sources such as lean meats, fish, eggs, and beans) and calcium (from foods like low-fat or fat-free milk or yogurt).
The human body is designed to purify itself. You can help by eating a variety of healthy foods. If you have questions about detox diets or are concerned about your weight, talk to your doctor or a registered dietitian.
Lots of bathroom time The side effects from prolonged, severe calorie restriction can include headache, fatigue, irritability, aches and pains. Because many rely on aggressive laxatives, these diets can also get pretty messy. Frequent bathroom visits can lead to irritation and breakdown of skin on your bottom, as well as dehydration.