For what it might be worth to you, I have been ingesting a Bowel Tolerance dose of ascorbic acid, basically every day [in 6 to 12 divided doses], for the past 19 years, and I can attest to the efficiency and efficacy of "the vitamin C flush." It will definitely clean out/up your GI Tract [as long as you ingest a BOWEL TOLERANCE dose], and provide MANY additional health benefits in the process.
You may be interested in the article written by a medical doctor found on this webpage http://vitamincfoundation.org/www.orthomed.com/titrate.htm
Also, consider this, "There are more than ten thousand scientific papers that make it quite clear that there is not one body process (such as what goes on inside cells or tissues) and not one disease or syndrome (from the common cold to leprosy) that is not influenced - directly or indirectly - by vitamin C." -- Dr. Emanuel Cheraskin, M.D., Dr. Marshall Ringsdorf, D.M.D., and Dr. Emily Sisley, THE VITAMIN C CONNECTION.
I wish you the best of success, Koko, in solving your health issues.