In this study, we aimed to compare the serum lipid peroxidation status, total antioxidant capacity and related enzymes such as catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPx), and trace elements such as zinc (Zn), copper (Cu) and manganese (Mn) in patients with various stages of breast cancer. Here, CAT is linked to breast carcinoma.