I have an 8 yo gelding who has struggled for years with ulcers, despite medical treatment and the use of some of the top rated supplements out there. On the suggestion of my vet, I switched him to Protek GI. After 2 months, a recent scope was the best yet, down to mild Grade 1, and on the path to full healing. The scope showed lots of "slime" protecting the area around the the pyloris, just as the makers said.