In response to crstar, yes, it is possible that the colonoscopy prep can irritate the lining of the colon a little bit. However, if someone is suffering from an inflammatory bowel disease, it is nowhere near the irritation that the disease can do to the colon. As for "natural things" not having side effects, it really depends on what you're using. Many supplements have absolutely no regulations to them and can do more harm than good. That being said, yes, many prescription drugs have side effects as well. But because they are regulated and tested, it's easier to know what these effects are and to manage them more properly.The tests do not "heal" anything, but they give practitioners a better idea of what they are trying to deal with. In inflammatory bowel disease, different drugs target different areas of the intestines, so there is a need to know. If the patient has no signs of this, it's more likely that IBS is the culprit, and it's safer to treat the patient with lighter medications, or no medications at all. IBS and IBD do share the fact that just because you are on a medication at one point, it doesn't mean you will have to remain on it for life. Obviously, it depends on the patient and the severity of the disease, but medications are often required to get symptoms under control, and then it's possible to work towards a medication-free life.Now I don't know your doctor, but from those that I've dealt with, none would have you go through a colonoscopy unless they truly felt it was to your benefit. It requires time on their part and on all the people who need to assist as well, so most doctors I know try to keep from doing a procedure unless they have to. And they are not paid on a case per case basis. It is great that the Fiber Menace book helped you out and you have been able to avoid medications. Currently I am on no medications, but I do attribute my "remission" (quotation marks because occasional flares still occur) to being on them in the past. I think it's great when someone can do things without the help of prescriptions, but it is not possible for everyone as the disease varies from person to person.