FGF19 and type 2 diabetes mellitus: In addition, low FGF19 levels were correlated with higher hepatic expression of CYP7A1 only in diabetic patients, while, FGF19 and bile acids levels were increased at higher rates in diabetic patients that went in remission of T2D after Roux-en-Y gastric bypass (RYGB) surgery, compared to non-diabetic or T2D patient that did not go in diabetes remission [15].