Gray acknowledges that Bentonite is quite effective at loosening mucoid plaque, but his reservation with it is that it lifts hardened mucoid without softening, moisturizing or dissolving it (as he says his herbal formula does) and the 'huge chunks or strips' can serve as a source of obstruction for the passage of fresh fecal material. Actually, the hardest and longest pieces of plaque that I ever passed were expelled when I used his cleanse...with no bentonite! Frankly, the significant quantity of this material can clog you up temporarily on either cleanse...I used enemas or colonics with both cleanses to keep things flowing so that I didn't get backed-up.