S.W.
Any product that claims it can "cleanse" your colon by swallowing a chemical is probably a bunch of bull (unless prescribed by a doctor in preparation for a colonoscopy). Believe it or not, your colon is a very efficient organ that keeps itself very clean and dispels most of its waste without any problems. You only need "aids" if you're feeling constipated. The claim that cleansing your colon will result in weight loss, is also bull. The only thing you might be doing (should these products actually work) is getting rid of excess water or helping move a natural waste process along. You won't lose any weight that way because as soon as you eat or drink anything, the weight just adds back up while your body digests. If you're looking to lose weight, the key is to eat fewer calories than you burn. There are no magic pills/shakes/herbs/etc that can help you (even Alli advertises that you can lose weight with that product, but only if you eat right and exercise.)