# GHK-Cu References: Primary Sources for the Copper-Peptide Record

> GHK-Cu references: the primary sources behind every figure on this site — fibroblast collagen, gene-expression, hair-count, skin-penetration, and copper-stability studies, with DOIs and PMIDs.

The full citation list — DOIs, PMIDs, and journals — so every circled number on this evidence wall can be traced back to the study it came from.

## How to read this list

This is the [full reference list](/references) for every quantitative claim on the site — each figure circled in the text maps to a numbered source here. The record skews toward in vitro and rodent work, with a handful of small human topical trials and one 45-patient hair-loss RCT of a 5-ALA + GHK combination [4]. Where a study tests an analog (AHK-Cu) or a combination rather than pure GHK-Cu, that is noted both in the text and below, because the form a study used determines what its result can support [14]. Reference 16 is the 2025 review used for the formulation, permeability, and comparative-procollagen figures [16].

## References

[1] Maquart FX, Pickart L, Laurent M, Gillery P, Monboisse JC, Borel JP. Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+. FEBS Lett. 1988;238(2):343-346. https://pubmed.ncbi.nlm.nih.gov/3169264/
[2] Pickart L, Margolina A. Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data. Int J Mol Sci. 2018;19(7):1987. https://pmc.ncbi.nlm.nih.gov/articles/PMC6073405/
[3] Pickart L, Vasquez-Soltero JM, Margolina A. GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration. Biomed Res Int. 2015;2015:648108. https://pmc.ncbi.nlm.nih.gov/articles/PMC4508379/
[4] Lee WJ, Sim HB, Jang YH, Lee SJ, Kim DW, Yim SH. Efficacy of a Complex of 5-Aminolevulinic Acid and Glycyl-Histidyl-Lysine Peptide on Hair Growth. Ann Dermatol. 2016;28(4):438-443. https://pmc.ncbi.nlm.nih.gov/articles/PMC4969472/
[5] Hostynek JJ, Dreher F, Maibach HI. Human skin penetration of a copper tripeptide in vitro as a function of skin layer. Inflamm Res. 2011;60(1):79-86. https://pmc.ncbi.nlm.nih.gov/articles/PMC3016279/
[6] Pickart L. The human tri-peptide GHK and tissue remodeling. J Biomater Sci Polym Ed. 2008;19(8):969-988. https://pubmed.ncbi.nlm.nih.gov/18644225/
[7] Pickart L, Vasquez-Soltero JM, Margolina A. The human tripeptide GHK-Cu in prevention of oxidative stress and degenerative conditions of aging: implications for cognitive health. Oxid Med Cell Longev. 2012;2012:324832. https://pmc.ncbi.nlm.nih.gov/articles/PMC3359723/
[8] Miller TR, Wagner JD, Baack BR, Eisbach KJ. Effects of topical copper tripeptide complex on CO2 laser-resurfaced skin. Arch Facial Plast Surg. 2006;8(4):252-259. https://pubmed.ncbi.nlm.nih.gov/16847171/
[9] Arul V, Kartha R, Jayakumar R. Biotinylated GHK peptide incorporated collagenous matrix: A novel biomaterial for dermal wound healing in rats. J Biomed Mater Res B Appl Biomater. 2005;73(2):383-391. https://pubmed.ncbi.nlm.nih.gov/15803494/
[10] Trachy RE, Fors TD, Pickart L, Uno H. The hair follicle-stimulating properties of peptide copper complexes. Results in C3H mice. Ann N Y Acad Sci. 1991;642:468-469. https://pubmed.ncbi.nlm.nih.gov/1809108/
[11] Lee S, Lee SM, Lee SH, Choi WK, Park SJ, Kim DY, et al. In situ photo-crosslinkable hyaluronic acid-based hydrogel embedded with GHK peptide nanofibers for bioactive wound healing. Acta Biomater. 2023. https://pubmed.ncbi.nlm.nih.gov/37832839/
[12] Jose S, Hughbanks ML, Binder BYK, Ingavle GC, Leach JK. Enhanced trophic factor secretion by mesenchymal stem/stromal cells with Glycine-Histidine-Lysine (GHK)-modified alginate hydrogels. Acta Biomater. 2014;10(5):1955-1964. https://pmc.ncbi.nlm.nih.gov/articles/PMC3976757/
[13] Molavi AM, Sadeghi-Avalshahr A, Nokhasteh S, Naderi-Meshkin H. Enhanced biological properties of collagen/chitosan-coated poly(epsilon-caprolactone) scaffold by surface modification with GHK-Cu peptide and 58S bioglass. Prog Biomater. 2020;9(1-2):71-82. https://pmc.ncbi.nlm.nih.gov/articles/PMC7289912/
[14] Pyo HK, Yoo HG, Won CH, Lee SH, Kang YJ, Eun HC, Cho KH, Kim KH. The effect of tripeptide-copper complex on human hair growth in vitro [tests AHK-Cu, the alanyl analog of GHK-Cu]. Arch Pharm Res. 2007;30(7):834-839. https://pubmed.ncbi.nlm.nih.gov/17703734/
[16] Mortazavi SM, Mohammadi Vadoud SA, Moghimi HR. Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospective. BioImpacts. 2025. https://pmc.ncbi.nlm.nih.gov/articles/PMC11830136/

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The GHK-Cu copper-peptide literature cut out and taped to one wall — each verified figure circled by hand, each inflated one struck through, and every missing stretch of human data marked in the margin, with no clinic pinned to this board and nothing here for sale.