Injectable GHK-Cu bypasses the stratum corneum barrier that limits topical bioavailability, which is the primary argument for injection over cream
STORAGE Lyophilized 28 C protected from light, 12+ months Reconstituted 28 C, 14 days protected from light (limited by GHK-Cu component) PEER-REVIEWED EVIDENCE Kotani M, Detheux M, Vandenbogaerde A, et al
For detailed stability information on specific semaglutide formulations, how long semaglutide remains effective and whether semaglutide expires after 28 days provide granular details that parallel the tirzepatide information in this guide
GHK-Cu $50.00 $90.00Price range: $50.00 through $90.00 GHK-Cu is a copper-binding tripeptide glycine, histidine and lysine (Gly-His-Lys) complexed with a copper(II) ion
Laboratory Handling & Safety Considerations Storage Protocol: Store lyophilized powder at 20C to 80C in dry conditions protected from light Reconstitute using appropriate sterile technique Store reconstituted solutions at 4C for short-term use Avoid repeated freeze-thaw cycles to maintain peptide integrity Create aliquots for single-use to preserve stability Research Observations from Literature: Published studies in animal research models report general tolerability with no major systemic toxicity observations in preclinical investigations
