The FDA recommendation for the "Guidance of the industry" regarding non-digestible carbohydrates, including Inulin, is so unbelievably ridiculous.
The FDA's "scientific evaluation" on the listing and benefits of these fibers, includes "citizen petitions" and "comments that we received".
These FDA recommendations have consequences, it allows anyone to just sell Inulin as prebiotics and claim it is "beneficial for gut health", whatever that means. While actual studies regarding crohn's disease, that show the potential for harm, can be flat out ignored.
https://www.fda.gov/media/113663/download