This trial isnt 100% free
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
2009 RCT documented improvements in mottled hyperpigmentation alongside fine-wrinkle reduction in photoaged skin 10
What this mechanism does NOT prove: That these pathways activate at the same concentrations in human tissue, via oral or subcutaneous routes, at doses achievable without adverse effects
Erika Gray, who was not engaged in the study, said, One way your body clears oxidative stress is through antioxidants, and glutathione is one of the primary antioxidants