I am a 43 mother and have done the RPA elim diet. I have Colitis that was triggered by a single episode of food poisoning ten years ago. It took a long time to get a diagnosis of microscopic colitis. For a long time I was told that it was irritable bowel. Finally a colonoscopy and biopsy showed it - a very under-diagnosed condition. My big 3 "no-no's" are: annatto 160b, synthetic antioxidants such as BHA 320, and sorbates. All of those cause cramping and diarrhoea. – Kate, by email