I'm pretty sure it is??? I know he mentions that all conditions of the bowel can be healed naturally and shows pictures of a colon with polyps, and I'm pretty sure he says to not use fiber or colonic irrigations with the high-pressure machines, but that colemas/enemas which are slower and low-pressure are safe. It's a very tough call, because if there is infection there that needs to be dealt with quickly. It's not a call I'd want to have to make!