The idea of detoxing - purging the body of poisons and other harmful substances, to bolster the immune system, eliminate fat and increase energy levels – has been around since at least the early 1900s. These days, it is more popular than ever, thanks to a gaggle of celebrity endorsements of popular diets. A quick search on Amazon.com turns up hundreds of books, cleansing products, herbs and nutritional supplements to help you cleanse your way to good health.