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doi: 10.1089/thy.2022.0139 80 SandersM

doi:10.1080/10715760802317663, PMID: 18671159 Franco R, Cidlowski JA (2009) Apoptosis and glutathione: beyond an antioxidant

Sulfur-containing amino acids (SAAs) like cysteine and methionine form disulfide bonds and undergo reversible S-glutathionylation, S-nitrosylation, and S-persulfidation that contribute to peroxidase, dehydroascorbate reductase, and transcription factor activity, thereby stabilizing the glutathione-to-glutathione disulfide (GSSG) redox couple

In details, serum separated, aliquoted and stored at -80 C within 1 h of venipuncture

Both work synergistically with endogenous GHRH, as Leal-Cerro and colleagues confirmed for GHRP-6: the full GH response depends on intact hypothalamic GHRH tone, and co-administration with a GHRH analog dramatically amplifies the combined effect