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Known as a powerful copper peptide, its often praised for improving skin firmness, reducing fine lines, and supporting collagen production
What Remains Unknown About Long-Term Use Long-term safety remains unclear for systemic and injectable GHK-Cu, especially repeated use, off-label use, compounded preparations, and use in higher-risk populations
Are Certificates of Analysis (COAs) available
These changes became more pronounced and consistent after 3-4 days of continued therapy [12]
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