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GHK-Cu serum is a copper peptide formula that may support the appearance of skin firmness and a more even, refreshed-looking complexion over time
The serum should be stored at room temperature (1525C / 5977F) away from direct sunlight light degrades the copper-peptide complex over time, which is why quality formulations use opaque or amber packaging
Nature 609 , 975985 (2022)
All concentrations were applied in triplicate
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