Hi, @gastrogirl. I can relate to your issue.I have 20% function in my only remaining kidney, am diabetic, and have gastroparesis. I wasn't exactly impressed with my local GI "help."

A GP diet conflicts with a renal diet and conflicts with a diabetic diet and a renal diet also conflicts with a diabetic diet so I have to do a balancing act with meals and have to make some compromises.

Fortunately, my PCP is very well versed in treating Type II diabetes and has a good understanding of GP. He said it's common for someone with GP to have fluctuating blood sugars and has helped me design a tummy-friendly diet with a workable insulin regimen.

However, I am a bit surprised that your insulin levels are high instead of your blood glucose readings being high. In my case, my GP diet tends to elevate my blood sugar one day and drop it the next. Most likely this is related to absorption times as slow food movement delays nutrients getting into the bloodstream even though insulin is still being produced and rapid gastric emptying can dump a lot of glucose into the blood in a shorter time. Perhaps your PCP can help you with your situation even without input from your gastro peeps?

Are you diabetic and do you take insulin? If your PCP can't help, would you consider seeing an endocrinologist?

Hope you find some answers soon.