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An efficient biological system (or a well-formulated supplement) uses the enzyme glutathione reductase to convert GSSG back into GSH, creating a continuous cycle of protection that maintains a healthy redox balance

A friend who does amateur bodybuilding told me about research peptides and specifically mentioned GHK-Cu for tissue repair

Reconstituted GHK-Cu only remains stable for 21-30 days refrigerated due to copper oxidation concerns

Lyophilized (unreconstituted) GHK-Cu powder stores much longer: Frozen at -20C: 18-24 months Refrigerated at 2-8C: 12-18 months Room temperature: 2-4 months maximum If you won't use a vial within 30 days of reconstitution, consider reconstituting smaller amounts more frequently rather than mixing everything at once

Because no preservatives other than bacteriostatic water are present, sterility and potency beyond the recommended usage period cannot be guaranteed