It's not so long ago that I started to be interested in this disease. I have read enough and, despite a great deal of information, I have been able to find this / it's just my opinion / that this and other autoimmune diseases have one and the same cause and very bad intestinal microflora. All food components are absorbed through the intestine into the body. Changes of the gut microbiota results in such diseases. Extracts from Hericium erinaceus relieve inflammatory bowel disease by regulating the immunity and gut of the microbiotaTherefore, it is beneficial for humans to adhere to proper diet to slow the progression of the disease. I'm sending you some of the links I've found:

https://www.researchgate.net/publication/319599104_Extracts_from_Hericium_erinaceus_relieve_inflammatory_bowel_disease_by_regulating_immunity_and_gut_microbiota

https://onlinelibrary.wiley.com/doi/full/10.1111/cen3.12401


Excuse me for any mistakes and bad formulations, but my English is not my native language.