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The free tripeptide was first identified in human plasma in 1973 by Loren Pickart as a factor supporting cell proliferation in liver cell cultures, and the copper-binding role of the peptide was recognized shortly afterward as the molecular basis for many of the activities attributed to GHK
This is not a definitive test, but if something smells wrong in addition to looking wrong, the evidence for discarding the vial becomes even stronger
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Galvan A, Cappellozza E, Pellequer Y, Conti A, Pozza ED, Vigato E, et al
They're similar in their mechanism, but the sequence of amino acids leads to varying impacts on skin health and hair growth appearance
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