glutathione cause constipation Dose-dependent Action of Zingiber officinale on Colonic Dysmotility and Ex Vivo Spontaneous Intestinal Contraction Modulation Glutathione-Mediated Conjugation of Anticancer Drugs:

In addition, differences in phase I and phase II enzyme activities may contribute to variation in the percentage transferred to urine or observed in blood

Testa AC, Ludovisi M, Mascilini F, Di Legge A, Malaggese M, Fagotti A, et al

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[DOI] [PMC free article] [PubMed] [Google Scholar] 22.Gawryluk J.W., Wang J.-F., Andreazza A.C., Shao L., Young L.T