My dad was diagnosed with CD around 20 years ago. Besides going through the usual cortisone treatments to control his flares and monoclonal antibodies starting with Remicade, then a couple of other ones that were less effective and now Humira, he has discovered that eating a cup of boiled Durvillaea kelp every day helps with his symptoms: https://en.wikipedia.org/wiki/Durvillaea_antarctica. It seems to have some nutrients similar to mucilagen that acts like a buffer in his case.