How could bentonite products (Sonne 7) passing through your intestines have any effect on the THC metabolites which go from your body fat to your bloodstream to your urine?
Bentonite is an inert clay that is completely indigestible. It never passes into the bloodstream and therefore has no contact with the THC metabolites.
Bentonite products are nothing but another expensive dilution scam, like those magic detox drinks. They work because of the amount of water you drink along with them. They do not convert THC metabolites into something that can't be detected, as they'd like you to believe. They do not "flush" them from your system. The only things that remove THC metabolites from your system are time and fat-burning exercise. You can duplicate the actions of these products by following the dilution guidelines thread and same yourself the money and from the nasty chalky taste of Sonne 7.
And if you are a regular user, forget about using any dilution techniques entirely. For a 100% effective pass, a substituted sample is in order.