What are the benefits of colon cleansing?

What are the benefits of colon cleansing?

The main goal of colon cleansing is to clear the colon of large quantities of stagnant, supposedly toxic waste encrusted on colon walls. Doing so, they claim, will enhance the vitality of the body.
Other stated goals include improving immune system, improving mental outlook and reducing the risk of colon cancer.

No quality research has been done to tell whether or not a colon cleansing is helpful.