Norepinephrine kinetics in response to 75 g oral glucose at baseline and after weight loss (WL) (n = 34): whole-body norepinephrine plasma spillover rate (A), arterial norepinephrine concentration (B), and norepinephrine plasma clearance (C). Values are means ± SE. Data (log transformed) were analyzed by two-way repeated-measures ANOVA, using the Holm-Sidak test for pairwise comparisons. **P < 0.01 and ***P < 0.001 versus time 0. Whole-body norepinephrine spillover rate: time effect P < 0.001; treatment effect P = 0.01; time × treatment interaction P = 0.003. Arterial norepinephrine concentration: time effect P < 0.001; treatment effect P < 0.001; time × treatment interaction P = 0.07. Norepinephrine plasma clearance: no significant time, treatment, or interaction effects. ●, baseline; ○, post–weight loss.