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Reconstituted injectable GHK-Cu: 2-8C (refrigerated): 28-30 days stable 15-25C (room temp): Degrades in 3-7 days 30C (warm): Degrades in 24-48 hours Topical serum (opened): 2-8C (refrigerated): 6-12 months 15-25C (room temp): 3-6 months 30C (warm environment): 1-3 months Raw powder (sealed): 2-8C (refrigerated): 24-36 months 15-25C (room temp): 12-24 months 30C (warm): 6-12 months Key takeaway: Every 10C increase in temperature roughly doubles the degradation rate
The long half-life (~12 days) means effects persist for weeks after discontinuation
Wu, "Effects of GHK-Cu on MMP and TIMP expression, collagen and elastin production, and facial wrinkle parameters," J
GHK-Cu is therefore the copper-complexed form of the GHK tripeptide, in which the peptide is bound to a copper (Cu) ion
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