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Divide the vial strength of 50 mg by the amount you use per injection
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Foundational GHK-Cu (sister peptide) paper: stimulates collagen synthesis in human fibroblasts, effect beginning at 10^-12 to 10^-11 M and maximal at 10^-9 M the same potency window later reported for AHK-Cu, establishing the copper-tripeptide mechanism
It solves the BAC water volume and syringe-unit draw
Hand skin is thin, sun-exposed, and washed many times a day
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