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GHK-Cu is a signaling peptide focused on repair and collagen production, not on increasing cell turnover in a way that causes purging

doi: 10.1039/D2CS00558A 65 HamidiS.MonajjemzadehF.Siahi-ShadbadM.KhatibiS

doi: 10.1111/cei.12672
Detection windows shift by test type: blood reads recent use within 72 hours, while hair holds traces up to 90 days

Jan 2008;8(1):109-16

So, for a document, you might need Read+Write, but for a script file, you would need Read+Execute