Objective To investigate the effect of vitamin C(VC) combined with vitamin D3(VD3) on intestinal permeability in guinea pigs with dextran sulfate sodium(DSS)-induced colitis. Methods Twenty-four male Dunkin-Hartley guinea pigs were randomly divided into four groups(6 in each group) according to their weight after one week acclimatization:normal(N) group with 200 international unit(IU)/kg VD3 + 100 mg/kg VC, model(M) group with 200 IU/kg VD3 +100 mg/kg VC, low VC(LC) groupwith, 200 IU/kg VD3 + 10 mg/kg VC, a...