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Dosing Protocols in Research Most gene expression studies used GHK-Cu at concentrations equivalent to: Subcutaneous injection: 12 mg/day (common biohacking protocol) Topical application: 15% concentration creams/serums (skin-focused gene effects) In vitro concentrations: 10100 nM range in cell studies For subcutaneous use, peptide community protocols typically run: Dose: 12 mg/day Cycle: 3090 days on, 30 days off Injection site: Subcutaneous, rotating sites Common stack: GHK-Cu + BPC-157 (synergistic tissue repair), GHK-Cu + MOTS-C (longevity stack), GHK-Cu + Retatrutide (body recomposition with connective tissue support) Topical use is effective for skin-specific outcomes
Theres no single answer, it depends on your goals and progress
Often, theyre sold online or through wellness clinics, and they arent FDA approved for medical use
3ZeitlerPArslanianSFuJ
Allergic reactions such as itching or rash are possible, particularly in sensitive skin
doi: 10.1172/JCI59903
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