Abstract:H2O2 was used to induce lipid peroxidation of RBC membrane in rats to observe the protective action of differentingredients of LbL and betaine on the membrane.The result shows these ingredients can inhibit the lipid perocidationof RBC membrane in the following order of antioxidizing power: Fructus Lycii.LbL,dry (FL/LbL,dry)> Polysacchar-ide FL/LbL>Residue FL/LbL>betaine.