they don't really bypass much of the intestine with RNY (not like they do with the DS), but then, I don't really know whether or not - or how much - of the intestine that they re-route is related to bile acids. I'd ask your bariatric surgeon, too. I've been hanging out on this and other boards for the last six or seven years, and this is the first time this has come up, believe it or not...
P.S. if it would be an issue, then sleeve would probably still be an option, since that surgery is all on your stomach - they don't touch your intestines.
