I really appreciate the explanation of how the gall bladder works and why we need fat in our diet. I have a friend that lost tons of weight by severely restricting her FAT intake to 5 grams of fat a day. She lost tons of weight...probably over 100 lbs. within a year's time. But had to have her gall bladder out and now has gained it all back. Cutting back the fat so severely is not something one can continue to do indefinitely. So the weight gain. I knew the gall bladder problem was due to her severe diet, but now I know why. Thanks for the info. PS. I am trying to encourage her to try low carbing. I think it would work for her, and be sustainable. Victoria