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Ibid., p
When standard, unformulated glutathione is ingested, the highly acidic environment of the stomach (which has a pH of less than 1.5) and the aggressive digestive enzymes (peptidases) in the small intestine rapidly cleave the tripeptide into its three constituent amino acids
Hashimoto, S
Tips: For best results, pair glutathione serum with vitamin C, as the two ingredients work synergistically to enhance brightening and antioxidant effects
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