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A serum containing authentic GHK-Cu at 0.1% concentration may test positive but deliver insufficient peptide dose to stimulate measurable collagen synthesis, which research shows requires 1% concentration applied twice daily for 12 weeks

[DOI] [PubMed] [Google Scholar] 78.Cavin C., Delatour T., Marin-Kuan M., Holzhauser D., Higgins L., Bezencon C., Guignard G., Junod S., Richoz-Payot J., Gremaud E., et al

The clinical significance of vascular endothelial function has become clear in many aspects such as understanding the etiology, pathogenesis, involvement in the development of atherosclerosis, therapeutic targets, and prognostic factors

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