Expression represent the mean values ± SE of GS subjects. Expression values for GS-free subjects were assigned as 1.00. Participants of the study were: GS, n = 16 (16 GS, 12F/4 M and 7), GS-free subjects, n = 14 (8 F/6 M). Age ranges were 62 ± 2 for GS-free, 57 ± 3 for GS. Gene ID corresponds to gene annotation obtained from NCBI web site. Expression of the following genes were determined: Slc10A2, ASBT (Apical sodium dependent bile acid transporter); Fabp6, ILBP (Ileal Lipid Binding protein); Abcc3, MRP3 (Multidrug resistance-associated protein 3); Ostα, Organic solute transporter alpha; Ostβ, Organic solute transporter beta; Fgf19, Fibroblast growth factor 19.