Bentonite clay is often recommended because it is believed that it covers a huge surface with a very fine layer of clay that allows digestion to take place and helps encrusted fecal matter to loosen from the intestines and be expelled by the psyllium seed fiber.
Unfortunately, it is aluminum-based, and there have been reports that we do indeed absorb some of this aluminum, so if you have any history of using aluminum cookware, drinking from aluminum cans, eating processed meals, or tests that validated aluminum overdose, don’t use it. There are other safe things that will help fecal matter come off the walls of the small intestine, such as digestive enzymes and herbs.
If you are prone to chronic constipation and have never cleansed your bowels before, it is unrealistic to simply start taking P&B shakes (shorthand for psyllium and bentonite clay) and expect that to cleanse your colon. Usually the fiber will simply get stuck somewhere. Psyllium is not that friendly a fiber, it is best mixed with other fibers and plenty of fluids or it is prone to turn into cement.
Additionally, the shakes cleanse so slowly that you’ll be faced with the healing crisis of stirred-up toxins: gas, bloating, discomfort, brain fog. This happens because dried, encrusted fecal matter is now being removed, moistened, and is able to enter the bloodstream or must be further fermented. The only solution is to cleanse faster, which is why I recommend colonics for the first stage of bowel management.
When supplementing with fiber more is not necessarily better. Don’t ask a weak colon to start pumping iron. You wouldn’t try to bench press 300 pounds after getting a cast off your arm, right? Same with the colon. Start off with just one rounded teaspoon a day, and never take more than one flat tablespoon at a single time unless you can tell that more is manageable. If you want to take more, it’s best to take the same dose multiple times a day at the same time every day. This helps reshape the colon, smooth it out.