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Safety Notes & Tips: Patch Test: Always perform a patch test on a small, inconspicuous area of your skin before full application

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FDA's career scientists have made clear they don't think there's enough data to support making peptides more widely available, specifically from compounding pharmacies, which mix customized medicines that aren't available from traditional drugmakers

Copper, Collagen, and Controversy: Inside the GHK-Cu Buzz TLDR GHK-Cu is a naturally occurring copper-binding peptide gaining popularity in skin regeneration, wound healing, and inflammation modulation

At 300 mcg, which is the standard current protocol, the effect size is likely more modest still