Is Colon Cleanse a big matter?

I totally disagree.I think it is just a big money matter.I have looked into it for years and found their medical "science evidence" to me is like green cheese on the moon.All ofr their "evidence is a diagram of the colon stating different areas effect different body functions. Where is any medical or scientific proof of their claims? It may help if repeated constipation exists,but many home remedies & over the counter remedies will do the same.I have known many who went into it hook,line & sinker,spending a fortune and at first thinking helps but later figured it just wasted their money.It's controversial,some are ok with it while many are not.