I repeat the following in many HN health related threads and I will continue to do so:
Prolonged (10 to 40 days) water fasting is a highly effective method for permanently reversing and curing most IBS (incl. Crohn's) and gut related diseases that are considered incurable by modern medicine.
Anyone interested - do your research. Literature is out there. Don't let lack of "scientific evidence" discourage you. No one benefits from researching and proving that not eating cures diseases that are currently multi-billion dollar industries. Open your eyes and enjoy your path to healing.