Which of the following is not an antioxidant?: (A) SOD, (B) Vitamin A, (C) Gluthione peroxidase, (D) Xanthine oxidase
Answer is D. Antioxidant Vitamin Vitamin E Vitamin C Beta Carotene selenium Metabolic antioxidants Glutathione: Reduced glutathione (GSH) plays a key role in the biological antioxidant enzyme system others: Ceruloplasmin, Transferrin, Albumin, Bilirubin, Haptoglobin enzymatic antioxidants (superoxide dismutase, catalase) ref satyanarayana 4th ed page 661