Exclusive Elemental Nutrition (EEN) has been studied extensively worldwide and has been scientifically proven to be more effective than steroids in achieving sustained remission from IBD flares in most cases. It refers to an exclusive liquid diet using either elemental or polymeric formulae. The patients are not allowed to have any other dietary items except plain water and sometimes a few other beverages.
EEN is safer, and can be easier to endure, than the side effects of steroids. It is a first-line treatment for IBD flares in Japan and in some European countries. It does require close medical supervision, especially when practiced by pediatric patients.