Demystifying Detox Diets

The Master Cleanse or Lemon Detox Diet, Fat Flush, 21 Pounds in 21 Days, the Liver Detox Diet ... these are just a few of the so-called "detoxification" diet plans that have become all the rage. Holistic healers and diet gurus are pushing all sorts of products and regimens that are supposed to help purge our bodies of chemicals and toxins, while helping us to lose weight -- fast!

But do you really need to rid your body of dietary "poisons"? Do your colon, liver, and lymph nodes need to be flushed and cleaned? And should you try one of these detox diet plans for weight loss and optimal body performance?

According to doctors and registered dietitians who spoke to WebMD, the answer is a resounding "no." A day on a detox diet program probably won't hurt you, but there's little point in following these restrictive diets - and they can do far more harm than good, says Michelle May, MD, author of Am I Hungry? What to Do When Diets Don't Work.

"Extreme diets generally do little more than cause frustration, are potentially dangerous, and are in general are a waste of time and money," May says.

What is a 'Detox' Diet?

Most detox diets promote herbs, pills, potions, colonics, and/or fasts to rid the body of impurities. They also promise quick weight loss. And yes, you will shed unwanted pounds -- not because of any medical magic, but because these plans are super-low in calories.

"You will lose weight, but it is the not the unhealthy fat you want to lose but precious body protein and fluids," says May.

Detox diets tend to be extremely restrictive, allowing only unprocessed plant foods, which are supposed to assist the lymph, kidneys, and liver with the detox process.

Gallons of water or specially formulated drinks along with herbs (usually only available on the diet's web site) are generally the only liquids allowed. One regimen calls for liquids (various concoctions including laxative teas) for 10 days, without any solids. Coffee, tea, alcohol, processed foods, and animal products are not commonly part of any detox diet plans.

Enjoying a plant-based diet is perfectly healthy, but most detox diets go to extremes, experts say.

"The limited variety of foods and beverages and minimum calories is of concern because it is very difficult to get all the nutrients and energy you need for good health with such restrictive regimens," says Christine Gerbstadt, MD, RD.

Unless you have religious or cultural reasons to fast or follow detox programs, she advises against them.

Potential Dangers of Detox Diets

Not only do the experts who spoke to WebMD say that we don't need detox diets, they believe these regimens have the potential to be harmful.

"Massive fluid losses upset the delicate fluid and electrolyte balance, can cause gastrointestinal distress, headaches, fatigue [and] irritability, and can lead to dehydration," says Gerbstadt.