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10.1001/jama.2017.21907 48 FebboJ.DakoF

Current Research Limitations Most clinical studies on GHK-Cu involve: Topical formulations In vitro research Animal models Systemic (non-injectable) delivery There is insufficient evidence in peer-reviewed literature to support: standardized injection techniques validated injectable dosing regimens long-term safety or efficacy data for injectable use As a result, clinicians should approach injectable discussions with caution and rely on evidence-based peptide education rather than anecdotal protocols

Eur J Med Chem (2015) 97:5574

10.1111/hel.13021 58 LiangB.YuanY.PengX.-J.LiuX.-L.HuX.-K.XingD.-M