Bio-Sponge is an intestinal protectant that is designed to help support healthy intestinal function in horses. It contains di-tri-octahedral smectite, a unique ingredient that has substantial capacity to adsorb and absorb toxins, viruses, bacteria and free radicals. A university study showed that Bio-Sponge adsorbed 99% of clostridium difficile and clostridium perfringens toxins in vitro. Administer orally. The 4-lb. bucket contains (18) 4-oz.servings.