Without a GB, while bile is still produced, it’s no “dumped” in adequate amounts when food is digested - especially those with fat content. Check with you Dr, but I’ve heard consistently from several practitioners that the supplement Ox Bile Acids can be VERY helpful. Also, a high % of those who’ve had their GB removed develop SIBO, due to big fat foods sitting in the stomach longer. Find out about SIBO, because it’s a critical issue that can results in several symptoms, including diarrhea. If your western MD is clueless, find a ND or GOOD nutritionist to advise you, including important info about the FODMAP diet.