 Group 1:will receive 50 of their dietary needs from a polymeric formula Modulen, Nestle and a limited whole food diet for 6 weeks Group 2: will receive EEN with Modulen for 6 weeks. At the end of 6 weeks, all patients entering remission irrespective of randomization will enter the second 6 week phase, continuing 25 of calories as Modulen in both groups. Patients in remission from group 2 will continue to consume 25 of calories as Modulen and be allowed free diet , patients in Group 1 will continue 25 of calories from Modulen but continue restricted diet. 