It's possible that his "No." was a hard answer to whether diet changes would affect your symptoms in general, but it's also possible that it's was a response in

It's possible that his "No." was a hard answer to whether diet changes would affect your symptoms in general, but it's also possible that it's was a response in the context of whether it would help the things that he would find on a colonoscopy. If possible I would ask him to clarify. Some doctors I've been to assume that I've already tried simple things to help with whatever issues I've had, and that is sometimes an inaccurate assumption.