Reviewed by the Scan Dose Research Team and Clinical Advisory Board
Glutathione
MODERATE EVIDENCESupplementLast updated April 5, 2026
SCAN DOSE SUMMARY
Glutathione is your body's master antioxidant — a tripeptide (glutamate, cysteine, glycine) present in every cell. Here's the problem: oral glutathione is poorly absorbed. Your stomach breaks it down before it reaches your bloodstream. Most research suggests supplementing with glutathione precursors (NAC, glycine + cysteine) is more effective than taking glutathione directly. Liposomal and sublingual forms may improve absorption somewhat.