Unglycosylated recombinant human glutathione peroxidase 3 mutant from Escherichia coli is active as a monomer Scientific Reports OXIDATIVE STRESScan contribute to hypothyroid symptoms When the body has to deal with too much Oxidative Stress from inflammation, then the enzyme Glutathione Peroxidase [GPx] has to work overtime to inactivate damaging " Enzyme Activity Measurement for Glutathione Peroxidase Fig. 3. Protection Against Oxidative Stress and IGF I Deficiency Conditions IntechOpen