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GHK-Cu is evaluated in laboratory research to study skin matrix, collagen, and copper peptide signaling research
The distinction between oral capsules and injectable peptides isn't just about convenience
Commonly Reported Side Effects Most of the side effects described online are mild and include: Injection-site redness or irritation Bruising Headache Nausea Temporary fatigue These reports are largely anecdotal and should not be treated as definitive safety data
Zeng Y, Tarbell JM
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