“Vitamin D has a specific influence on the bacterial communities in CD, but not in healthy controls.”
Read more here.
Schäffler, H., Herlemann, D.P., Klinitzke, P., Berlin, P., Kreikemeyer, B., Jaster, R. and Lamprecht, G. (2018), Vitamin D administration leads to a shift of the intestinal bacterial composition in Crohn’s disease patients, but not in healthy controls. Journal of Digestive Diseases, 19: 225-234. https://doi.org/10.1111/1751-2980.12591