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A small welt after a GHK Cu injection can be a temporary local histamine response and doesnt automatically mean youre allergic. Understanding the difference between a common injection site Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit Copper, Collagen, and Controversy: Inside the GHK Cu Buzz Why Does GHK Cu Burn When You Inject It? (And How to Fix It)
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