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Freezing may cause structural damage, especially in liposomal or liquid forms
Bioavailability Topical GHK-Cu achieves good local bioavailability in the skin but minimal systemic absorption
EOD dosing appears sufficient for anti-aging goals where the downstream gene expression changes outlast the peptide's plasma clearance GHK-Cu's impact on collagen and elastin gene expression persists for days after a single dose, meaning you don't necessarily need daily systemic presence
This is not catastrophic
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