I have combined the Institute of Functional Medicine elimination diet with the Monash Low Fodmap diet, plus only low or no histamine producing foods since May 10th. It is now June 16th. I will continue for 3 more weeks before reintroducing food one at a time. I am experimenting on myself. Two years ago, I became a Functional Medicine Coach in order to apply this medical approach and knowledge to myself. If I find substantial, meaningful change, I will have my own personal experience to share. After 5 weeks of these food plans, I feel much better and will continue another 3 weeks. Two years ago, my BMI was in the morbidly obese category, Now I'm in the obese category and hopefully this year, I will be in the overweight category. In the hospital and under anesthesia, I had a colonoscopy/endoscopy and found out I have a redundant/tortuous colon. My gastritis symptoms have gone down to mild (no medication nec,) and I'm awaiting biopsies from both ends. After 5 weeks on these combined diets, I still experience extreme constipation with no urge. I take Digest Tone (Triphala and Rose, an Ayurvedic formula). I get a Xolair injection (a monoclonal antibody that inhibits IgE production) eve. 2 mos. for an autoimmune condition. I'll keep you posted as to the benefits of this regime and what I find out after reintroduction of foods.