CYP7A1 and type 2 diabetes mellitus: In a study of 115 patients with T2D who underwent RYGB, those who experienced complete remission of T2D after surgery were found to have higher levels of FGF19, this suggested an important role for the FGF19‐CYP7A1‐BAs pathway in the etiology and remission of T2D after RYGB.154