According to Health Day News:
Despite the popularity of colon cleansing, there's no evidence that the procedure -- which can be done at home or in day spas -- offers any health benefits, a new study finds.
However, colon cleansing can cause serious side effects ranging from vomiting to kidney failure and death, the authors of the report say. READ MORE: Colon Cleansing Has No Health Benefit, May Harm: Report 
Have you ever tried one? Did you feel it was beneficial?