Several lines of antioxidant defense against oxidative stress: antioxidant enzymes, nanomaterials with multiple enzyme mimicking activities, and low molecular weight antioxidants Archives of Toxicology Springer Nature Link First line defence antioxidants superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX): Their fundamental role in the entire antioxidant defence grid ScienceDirect Comparison of Superoxide Dismutase Activity at the Cell, Organ, and Whole Body Levels Cell Biochemistry and Biophysics Springer Nature Link Enhancing the skin's natural antioxidant enzyme system by the supplementation or Upregulation of Superoxide Dismutase, Catalase, Glutathione Peroxidase glisodin sod gliadin complex