increasing intracellular glutathione NACET strongly increases the (GSH) content in The Biological Functions of Glutathione

While Retatrutide is in Phase 3 clinical trials and not yet FDA-approved in the US, Canadian researchers can access it through domestic research peptide suppliers

& Vennekens, R

J Thorac Oncol 3(4):351-7, 2008

Giesguth M, Sahm A, Simon S, Dietz KJ

The role of oxidative stress in the COVID-19 disease may involve recognition of the viral S-protein by angiotensin converting enzyme-2 (ACE2) receptor and pattern recognition receptors like toll-like receptors 2 and 4, and activation of transcription factors like nuclear factor kappa B, that subsequently activate nicotinamide adenine dinucleotide phosphate (NADPH) oxidase (NOX) expression succeeded by ROS production (Kozlov et al., 2021)

Not all GPxs (defined by homology), however, use GSH, nor do they all contain Sec at the active site