I read a paper that said een significantly improved gut biome in terms of removing harmful bacteria, that thrives on sugar, and so I think it's worth doing even for colonic inflammation. Gut biome is heavily under researched for ibd. And I don't imagine many with ibd have a biome balance anything like healthy patients.
In general, treatment with EN causes a reduction in microbiome diversity and increases dysbiosis, usually shifting away from what would be considered a "healthy" microbiome in controls. Some studies use stool samples to come up with a microbiome picture, others mucosal tissue, and the results vary somewhat. But in general, EN "worsens" dysbiosis and greatly reduces microbiome diversity.
Whatever method of action underlies EN and its ability to reduce inflammation in crohn's disease, it is unlikely that it is the result of a microbiome shift to a so-called "healthy microbiome", quite the opposite.
explains why liquid diets help calm and repair?
One of the most important studies and clues we have are those from professor Rutgeerts. He did very important research in the 80s and 90s.
One of his most interesting studies are his crohn's disease studies about the impact of the fecal stream.
-If you remove or divert the fecal stream in patients, their bowel heals.
-If you introduce a patient's effluent onto previously unaffected tissue, that tissue develops crohn's disease.
-If you filter that same effluent to the point where all bacteria, fungi and microparticles are removed, no inflammation takes place.
A different team under Harper confirmed this in his own patients. This happens in every single patient, and these studies were well done.
You treat people with EN (malnourished, underweight) or you use intravenous feeding for serious cases (anorexic, hypercatabolism), and somehow their bowel heals. This might be explained due to a reduction in the fecal stream.