Glutathione is a natural antioxidant your body makes, and it can influence melanin production which is why it's sometimes marketed for skin brightening. Oral supplements are mostly broken down in the Glutathione Depletion in Mitochondrial Diseases Glutathione Reporter How Does Glutathione Work? AgelessRx Injectable Glutathione Enzymatic glutathione production using metabolically engineered Saccharomyces cerevisiae as a whole cell biocatalyst Applied Microbiology and Biotechnology Springer Nature Link