Hello, I may have already posted my two cents but I have had a few bouts of PI since 2001 when I had a proctocolectomy and pouch construction. Shortly thereafter the pouch was hooked up I developed COPD. My doc at CCF said 30% of his patients also have COPD - another autoimmune disease.
I follow the microbiome diet (Robyn Chutkan, The Microbiome Solution). My pouch has been perfect since I changed my diet. I'm also in a mindfulness group, walk 2-3 miles a day. So the whole package seems to be working to keep my pouch calm.
I hope this helps. All the best.