glutathione sigma aldrich G4251-100G L-Glutathione reduced >=98.0%, Refrigerated item 340469 oxidized glutathione (GSH/GSSG) ratio serves as an indicator of oxidative stress Glutathione (GSH) Assay Kit Sigma-Aldrich

The role of glutamine in cancer cell growth Rapidly proliferating cancer cells take up glutamine from plasma via various amino acid transporters, and then it is converted to glutamate in the mitochondria by the two forms of glutaminase: kidney-type glutaminase (GLS)1 and liver-type GLS2 8

1969 Nov 6;37(4):5936

Impact of prebiotics on enteric diseases and oxidative stress

PMID: 36861754 J Bone Oncol Identification of GPC3 mutation and upregulation in a multidrug resistant osteosarcoma and its spheroids as therapeutic target

Alpha-lipoic acid is sometimes mentioned in this context

There are even animals such as fish, that constantly can rejuvenate their eye, so its doable in other life forms