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(2019) 'Dietary nutrients for glutathione support', Nutrients , 11(9), 2073

9 Some studies in critically ill humans have actually shown an increase in plasma cysteine accompanying a decrease in intracellular glutathione, 10,11 suggesting a defect in, or down-regulation of, glutathione synthesis from cysteine

Rocz Panstw Zakl Hig 66(1):6167 Ghasemi A, Zahediasl S, Hosseini-Esfahani F, Azizi F (2014) Gender differences in the relationship between serum zinc concentration and metabolic syndrome

whereas HESCs isolated from women who achieved pregnancy were more frequently in S phase (actively replicating), HESCs isolated from subjects with implantation failure were more frequently in G0/G1 phase, suggesting senescent cells in cell cycle arrest