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glutathione coupled with Two-step enzymatic reaction of synthesis. The first step is Glutathione-Mediated Conjugation of Anticancer Drugs:
Description
[DOI] [PMC free article] [PubMed] 267.Sun B, Li F, Lai S, Zhang X, Wang H, Li Y, Wang W, Chen Y, Liu B, Zheng Y

This preserves both ingredients' efficacy while avoiding pH conflict

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it can be a signal that one of them is present
