RSV prevents PCB-77-induced impairment of glucose or insulin tolerance. Mice were administered vehicle (VEH) or PCB-77 (50 mg/kg) in 2 divided doses. Mice in each treatment group were fed either standard mouse diet or diet enriched with Resvida™ (RSV, 0.1%). A, Blood glucose levels after administration of glucose. B, Blood glucose levels after administration of insulin. C, Area under the curve (AUC) for data in A. D, AUC for data in B. Data are mean ± SEM from n = 5 mice/group. *, P<0.05 compared to PCB77+RSV (A,B) or compared to VEH (C,D).