Clinically, BAM is classified as follows [3]: type 1: ileal dysfunction/resection (Crohn's disease); type 2: primary or idiopathic, characterised by watery diarrhea with (IBS) or without (FD) pain responding to bile acid sequestrant drugs (BASs); type 3: associated with other gastrointestinal disorders such as coeliac disease, small intestinal bacterial overgrowth (SIBO), and chronic pancreatitis; and type 4: due to an impaired FGF-19 feedback inhibition that causes excessive BA synthesis [4]. Here, FGF19 is linked to Fabry disease.