glutathione regenerates vitamin c LA and DHLA regenerate endogenous antioxidants such as vitamins and RAPHA HEALTH - Twin Pack

Mack CM, Soares CJ, Wilson JK, Athanacio JR, Turek VF, Trevaskis JL, et al

Endsley JJ, Furrer JL, Endsley MA, McIntosh MA, Maue AC, Waters WR, Lee DR, Estes DM: Characterization of bovine homologues of granulysin and NK-lysin

doi:10.1093/jn/134.3.489

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Methionine is an essential amino acid, and selenium is an antioxidant that acts as a cofactor for glutathione peroxidase which neutralizes hydrogen peroxide (see Figure 1)