The old myths about Gall Bladder removal is fat, 40, and fertile. What I mean by this is that the world of healthcare use to believe that, women, pregnancy, being overweigth, and approx 40 yo were all predictors of haveing Gall Bladder problems. As for it being related to WLS, in a way, as stated above, any major diet change and major weight loss can cause problems with the Gall Bladder. Even if you did not have WLS and went on a succesful diet, you would probably have the same outcome. I have known people that did not have probblems even years after WLS.