AZGP1 and metabolic syndrome: Serum ZAG levels were highest in control subjects and decreased with increasing metabolic severity (8.78 ± 1.66 μg/mL for control vs. 8.37 ± 1.52 μg/mL for subjects with central obesity vs. 7.98 ± 0.94 μg/mL for subjects with metabolic syndrome, p < 0.05).