I'm happy to share my anecdotal experience. My gall bladder was removed about 20 years ago, and I've had problems with bile dumping ever since. In my experience, this irritating side effect has not been exacerbated by a switch to eating primally. Actually, to the contrary, as when I used to indulge in a bowl of noodle-heavy pho, I sometimes barely made it back to the office in time. Now, I still have bouts, but immodium is my friend. Other than that, no other complaints about the lack of a gall bladder and primal eating. Lately, I've started taking lecithin capsules and it seems to help. If your friend has specific questions, I'm happy to add my anecdotal two cents.