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Glutathione is a required substrate for a family of enzymes called glutathione S-transferases, which conjugate glutathione to reactive compounds including drug metabolites and environmental toxins making them water-soluble for excretion

Kase CS, Robinson RK, Stein RW, DeWitt LD, Hier DB, Harp DL, Williams JP, Caplan LR, Mohr JP

Consistent Formulation: The exact chemical structure, active pharmaceutical ingredient (API) concentration, and excipients (inactive ingredients) are standardized

It shifts production from dark eumelanin toward lighter phaeomelanin, which is why long-term users often describe a warm, even glow rather than a stark colour change