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By slowing down the activity of tyrosinase, Glutathione effectively reduces the formation of excess melanin, particularly the darker type known as eumelanin, and encourages the production of lighter pheomelanin

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Noctor G, Arisi A-CM, Jouanin L, Valadier M-H, Roux Y, Foyer CH (1997) Light-dependent modulation of foliar glutathione synthesis and associated amino acid metabolism in poplar overexpressing -glutamylcysteine synthetase

This naturally occurring antioxidant is well-tolerated by all skin types, including those with sensitive and acne-prone skin