Effect of Camellia sinensis on Fat Peroxidation and Ox-LDL in Rats

Green tea (GT) is believed to have antioxidant properties and beneficial effects on the treatment of some diseases. However, few findings were found concerning the impact of GT on oxidative stress. In the present study, the protective influence of GT against the oxidative stress caused by hydrogen peroxide (H₂O₂) in rats was evaluated. The research groups included a control (Con) group and five groups supplemented with 10g GT(G1), 20g GT(G2), 1% H₂O₂(P), 1% H₂O₂and10g GT (GP1), as well as 1% H₂O₂ and 20g GT(GP2). The effects of GT and H₂O₂ administration on serum biochemical parameters, such as lipid profile, malondialdehyde (MDA), and oxidized low-density lipoprotein (Ox-LDL) were assessed. The findings of this research revealed that the usage of GT lowered the level of cholesterol, triglyceride, LDL, MDA, Ox-LDL and coronary risk index. Moreover, an increase in high-density lipoprotein and very-low-density lipoprotein (VLDL) was observed in subjects who received GT, compared to the rats of the P group. The baseline lipid profile and GT consumption with or without H₂O₂ were the same between the Con and GT-treated groups. Therefore, GT usage was found to be advantageous in reducing Ox-LDL and lipid peroxidation in rats. These results confirm the traditionally claimed benefits of GT for protection against lipid peroxidation and atherosclerosis.