Effect of isoquercitrin on lipid peroxidation. Isoquercitrin significantly reduced the lipid peroxidation in a dose-dependent manner. The highest concentration of isoquercitrin showed the greatest potential in suppressing lipid peroxidation in PC12 cells. Data are mean and S.E. values from three independent experiments (n = 3). #p < 0.01, relative to control cells. **p < 0.01 and ***p < 0.001, relative to cells treated only with 6-OHDA.