The best replacement for bentonite is kaolin.

The best alternatives to bentonite are rated as following:
★★★★★  kaolin
★★★★★  zeolite
★★★  montmorillonite
★★★  rhassoul clay
★★  diatomaceous earth
★★  green clay
★★  sparkolloid
★★  azomite
★★  french green clay
★  sodium bentonite
★  montmorillonite clay
★  calcium bentonite
★  kaolin clay
★  sparkoloid
★  activated charcoal
  rhassoul
  barite
  calcium bentonite clay
  pectic enzyme
  pascalite clay
  bentonite
  attapulgite

Your alternative for bentonite is not listed? Suggest!
Speaking about bentonite, one probably shouldn't forget about psyllium.

Other search terms related to bentonite and their ratings are:
★★★★★ psyllium
★★★ master cleanse
★★ wine making
You have in mind a companion for bentonite and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of bentonite in all years. Click on graph for more.
bentonite
kaolin
zeolite