A new study from France revealed that eating lots of animal protein appears to increase the risk of inflammatory bowel disease (IBD) in women. The study was conducted on 67,000 women in France over a long time period to find risk factors for different diseases, including cancer and other common illnesses. There are no conclusions that are being drawn from the study, but it does suggest that diet does potentially play a role in the disease.An excerpt:
Women who consumed the most protein were at more than triple the risk of being diagnosed with IBD, the researchers found; animal protein accounted for most of the risk. Risk was specifically associated with high intake of meat and fish, but not with dairy products or eggs.
While experts have long suspected that diet might play a role in inflammatory bowel disease, Carbonnel and his colleagues note, the only links identified previously were with eating a lot of fats and certain kinds of sugars. Those studies were more prone to error than forward-looking or prospective studies like the current investigation. There have also been several studies linking vitamin D deficiency to IBD.
Another excerpt regarding the potential link to IBD:
Meat could contribute to inflammatory bowel disease risk because digestion of animal protein produces many potentially toxic "end products," such as hydrogen sulfide and ammonia, the researchers note. Also, Carbonnel pointed out, a high-protein diet could alter the mix of bacteria that live in the colon.
The article doesn't comment on it, but I would argue that there is potentially another possible causation here. The reasons suggested are that the high intake of proteins is either generating toxic end-products or causing dysbiosis of the bacterial mix. If that were the case, though, this type of correlation would be present with other types of animal protein sources, including dairy and eggs. But there was not. (As an aside, I would also expect that other food types - e.g. starches, sugars, etc. - also produce these types of toxic end-products as well). I think another alternative cause could be the bacteria present in meat and fish stocks. Contamination from these food sources (e.g. MAP), could also be an explanation. Hopefully that's a third alternative they'll do additional research on. Either way, interesting study.