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For Heart Health: Psyllium fiber, the natural dietary fiber found in Metamucil, is clinically proven to help lower cholesterol levels because it forms a thick gel that traps some cholesterol, bile acids and waste in the gut.
Your colon doesn't need a cleanser to do its job. My advice is to ignore such claptrap. Any treatment of your colon should be done by a medical doctor. If constipation seems to be a problem, you probably need more exercise or more dietary fiber, or both. An easy way to add more fiber to your diet is to use Metamucil or put some ground psyllium on your cereal. Metamucil is basically ground psyllium with sugar and flavoring added. I prefer plain ground psyllium.