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The solution should appear clear without particles
That is measured by an elemental technique, inductively coupled plasma mass spectrometry or atomic absorption spectroscopy, not by chromatography, and a certificate reporting only peptide purity has not established that the material is a complex at all rather than a peptide with some copper alongside it
GHK-Cu is a naturally occurring tripeptide
10.1159/000495871 28 DuM.WangJ.ChenH.WangS.ChenL.XuY.et al
Maguire, J., et al
107 LiZ.MizunoS.NakamuraT
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