glutathione precursor complex Mode of action of Amino acid Precursors (GAP) and functions Glutathione Complex Capsules, 60ct

Notably, fibroblast growth factor 2 (FGF2), leukemia inhibitory factor (LIF), and insulin-like growth factor 1 (IGF1), collectively termed FLI medium, significantly improve mouse oocyte quality, as evidenced by enhanced blastocyst formation rates

Diet Glutathione is a substance you can obtain through dietary sources

Toxicol Res (Camb) 2016;5:5118

In addition to the relevance of POP conjugation cited previously, hyperglycemia and hyperinsulinemia appear to directly inhibit glutathione synthesis (GCL), and the increased production of reactive oxygen species which accompanies diabetes further depletes GSH levels

Chen XW, Sneed KB, Pan SY, Cao C, Kanwar JR, Chew H, et al

In wild-type mice, GGT localized to the apical surface of the proximal tubules cleaves the -glutamyl bond releasing glutamate and cysteinylglycine