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Oncol Lett 23(3):104

Corneal-research applications have been characterised since a 2002 Experimental Eye Research paper (PMID 11950239) and through recent 2025 engineered-fragment work

NY: Investigation, Writing original draft

In fact, in an experiment using mice orally administered cystine and theanine alone or in combination before immune stimulation, no significant increase in the GSH level was observed in the liver after immune stimulation in the groups administered either agent alone compared with the control group, but it was significantly increased, and the antigen-specific immunoglobulin (Ig) G production in blood was also significantly augmented, in the group administered both agents (Kurihara et al