Interesting . I have recently posted a thread on this forum under ask a question about gut flora and insulin resistance which was generated because I had watched a BBC programme on Monday night A doctor in the house where a young lad's lack of diversity of gut flora was said to be the cause of insulin resistance .
Your post is really interesting as a couple of years ago I was diagnosed with mild ulcerative colitis , I was unable to tolerate the drugs and my consultant suggested Aloe Vera and very lucky for me it put the UC into remission. After an accident I had a HbA1C test while my UC was not under control and about a year later just before an operation I had one ( which covered part of the 3 month period for the HbA1c when it was under control and the (HbA1c) fell 40% even though I had not changed my diet and take no meds apart from Aloe Vera.
My view is that for me there is a relationship between UC and higher blood sugars.