There was an interesting article published in Nature last year about the damage that food emulsifiers may be doing to our guts by impacting the microbiota. I just searched the j-pouch forums and didn't find any discussion about this.
Has anyone tried an emulsifier-free diet? Has anyone who has access to Bo Shen asked him about this?
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This is a reasonably new article (early 2015) and discusses the mouse gut. I did a Google search and found no scientific articles relating this in human terms. There have been many mouse studies that bever panned out to correlate to the human body. So, it is too soon to tell. More studies, and specifically human, or at least primate studies, are needed to draw any real conclusions.
That said, it is always best to eat as much whole, unprocessed food as possible.
Jan 
During my GI visit with Dr Colombel, the director of Mt Sinai IBD research center at NYC, I was strongly advised not to consume emulsifiers. They told me that emulsifiers strip off the protective lining of the intestines.
Ice cream, they said is loaded with multiple types of emulsifiers, as emulsifiers give a creamy consistency. They told me to stay away from such ice cream. So I only buy so called "natural" ice cream that has no emulsifiers in them. Many ice cream brands have a "natural" line, so I guess many people are bothered by them.
