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While glutathione itself crosses this barrier poorly, the brain can synthesize glutathione from precursor amino acids, and systemic glutathione elevation may indirectly support brain glutathione status through various mechanisms including reduced oxidative stress on blood-brain barrier integrity and improved availability of glutathione precursors

In fact, supplementation of glycine for 4 weeks resulted in an 85% increase in aortic GSH, 64% decrease in aortic GSSG, and an overall significantly higher GSH/GSSG ratio [53], with a concomitant increase in expression levels of GSH biosynthetic enzymes

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Understanding its core components and how they interact with other well-researched peptides is paramount for designing effective and impactful studies