CAT and neurodegenerative disease: These include enzymes, proteins & some bio-organic compounds such as catalase (CAT), glutathione peroxidase (GPx), superoxide dismutase (SOD), ferritin, ceruloplasmin, glutathione, vitamin C, and vitamin E. Due to their beneficial role in terms of antioxidant activity, maintenance of human health, prevention and treatment of degenerative diseases, these biological compounds have gained considerable attention from scientists, physicians, and the general public [4].