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How is the purity of GHK-Cu verified?+ Every lot ships with its own per-batch Certificate of Analysis: identity confirmed by mass spectrometry, 99% purity by HPLC, and a unique lot number you can verify against the vial you receive

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Clinical effect depends on the reason for use, individual metabolism, formulation, and adherence, so a clinician sets the cadence after reviewing your history and goals rather than following a blanket interval from an article