CPs supplementation ( @ g/d ) for @ weeks significantly lowered serum levels or activities of total cholesterol , triglyceride , alanine aminotransferase , aspartate aminotransferase , malondialdehyde and tumor necrosis factor - , and significantly increased serum activities of superoxide dismutase and glutathione peroxidase , but the same dose of whey protein and corn starch ( placebo ) did not demonstrate these effects .