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The percentage that reaches systemic circulation intact is estimated to be quite low, though exact figures for GHK-Cu specifically aren't well established in published literature

This is intentionally non-prescriptive

Important points: Dosage can vary from person to person Body weight and goals matter It should not be self-used without proper guidance Always be careful with sourcing and quality For safety, it is always better to speak with a professional before using any peptide product

Kumar V, Maitra SS, Singh R, Burnwal DK (2020) Acclimatization of a newly isolated bacteria in monomer terephthalic acid (TPA) may enable it to attack the polymer polyethylene tere-phthalate (PET)