Hi! I just joined the forums today, since I do so much of my own investigating here
I've suffered from what appeared to be IBS-D for the last 10 years. I've tried every elimination diet imaginable - gluten, dairy, insoluble fiber... etc. The past 2 years I've resorted to barely eating and popping imodium like candy just to "get by".
Last week I had laparoscopic cholecystectomy due to gallstones and inflammation that have been causing intermittent attacks for the past 5 years.
I was interested to hear that you had improvement of your symptoms post-op. As have I, even though I was concerned I would be one of the unlucky few who end up with post-cholecystectomy syndrome.
The reduction of diarrhea after gallbladder removal can sometimes be attributed to the fact that inflammation of the organ was causing those symptoms in the first place. In your case I wonder, since you wouldn't be likely to have had gallbladder inflammation for as long as you've had your symptoms.
The body doesn't digest fat quite as well without a functioning gallbladder, so a low fat, small portion diet has been helpful for me in the past few months.
If you've tried this too without relief, have you also tried cholestyramine (Questran)? It helps to bind bile acids and may help relive bile related diarrhea.
Good luck in your search for relief! It's nice to know we don't have to go it alone