Body cleanse pills - Worth anything?

You know all those pills, the 7 or 14 day pill programs. They're supposedly designed to flush out blockages of waste in your digestive tract. I'm not asking this from a weight loss perspective, I'm asking from a general health one - is there a point to this? I know they work enough to send you to the bathroom a lot, but is there any real basis to you becoming more able to absorb nutrients, or whatever the claims are, after doing one of these body flush programs?

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