[DOI] [PMC free article] [PubMed] [Google Scholar] Takeuchi T, Tanaka Y, Ishiguro N, Yamanaka H, Yoneda T, Ohira T, Okubo N, Genant HK, van der Heijde D
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If administered by injection, local reactions such as redness, swelling, itching, or pain can occur, and improper technique can increase infection risk
Human Studies Human data remain limited, and most studies are small, single-center, or use copper peptide formulations combined with other ingredients (which makes it hard to isolate GHK-Cu's specific contribution): A 2016 Lee et al
Fertility is no exception
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