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For example, in one trial, two months of 500 mg/day glutathione lozenges led to measurable lightening in the majority of participants

Toxicology in Vitro 57:194202

The tripeptide, glutathione, is one third glutamate and present at up to low millimolar intracellular concentrations in brain, mediating antioxidant defenses and drug detoxification

Research has shown that GHK-Cu supports: Increased collagen and elastin production Improved skin firmness and texture Reduction in fine lines and visible aging Faster skin repair after damage or irritation Rather than acting as a surface-level cosmetic solution, GHK-Cu works at the cellular level, supporting the processes that keep skin resilient, hydrated, and healthy over time