Biohacker's Glutathione is the body's main antioxidant defense mechanism produced in the liver. It protects against free radicals and helps to eliminate lipid peroxides as well as toxins. This is by Emerging role of glutathione peroxidase 4 in myeloid cell lineage development and acute myeloid leukemia Cellular & Molecular Biology Letters Springer Nature Link Glutathione Peroxidase: An Antioxidant Enzyme In Health And Disease Glutathione reductase Wikipedia Insights into the catalytic mechanism of synthetic glutathione peroxidase mimetics Organic & Biomolecular Chemistry (RSC Publishing) DOI:10.1039 C5OB01665G