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10.1172/jci.insight.122360 180 WangZ.BaoW.WujietiB.LiuM.LiX.MaZ.et al (2025)

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It has low bioavailability because the tripeptide is the substrate of proteases (peptidases) of the alimentary canal, and due to the absence of a specific carrier of glutathione at the level of the cell membrane