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Size:10ml [DOI] [PubMed] [Google Scholar] 56.James SJ, Cutler P, Melnyk S, et al capillary hair treatment GHK-Cu Copper Peptide: Benefits, Dosage & How It Works (2026) https://primepeptideresearch.com/wp-content/uploads/2026/01/5-Amino-1MQ.png

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