Comparison of sleeve gastrectomy to normal anatomy. Glucose (A), glucagon-like peptide 1 (GLP-1) (B), insulin (C), peptide YY (PYY) (D), glucagon (E), insulin clearance (F), time to peak insulin secretion (G) and prehepatic insulin secretion (H) during mixed meal testing after reversal to sleeve gastrectomy (black line and closed circles) and normal anatomy (gray line and open circles). Error bars represent standard error of the mean.