# GHK-Cu Research References: Cited Studies and Sources

> GHK-Cu research references — 22 cited peer-reviewed publications including Maquart 1988, Pickart 2014–2018, Lee 2016 hair RCT, Kuceki 2025 alopecia study, and recent 2024–2025 literature.

## Full Citation List

All 22 references cited across this field guide, organized by reference number. GHK-Cu research references span 1988–2025, with the majority in the Pickart laboratory tradition supplemented by independent replications and recent 2024–2025 work in gut, muscle, skin permeation, and alopecia.

[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 Letters. 1988;238(2):343-346. DOI: 10.1016/0014-5793(88)80509-x PMID: 3169264. https://pubmed.ncbi.nlm.nih.gov/3169264/

[2] Pickart L, Vasquez-Soltero JM, Margolina A. GHK and DNA: Resetting the Human Genome to Health. BioMed Research International. 2014;2014:151479. DOI: 10.1155/2014/151479 PMID: 25302294. https://pmc.ncbi.nlm.nih.gov/articles/PMC4180391/

[3] Pickart L, Vasquez-Soltero JM, Margolina A. GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration. BioMed Research International. 2015;2015:648108. DOI: 10.1155/2015/648108 PMID: 26236730. https://pmc.ncbi.nlm.nih.gov/articles/PMC4508379/

[4] Pickart L, Margolina A. Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data. International Journal of Molecular Sciences. 2018;19(7):1987. DOI: 10.3390/ijms19071987 PMID: 29986520. https://pmc.ncbi.nlm.nih.gov/articles/PMC6073405/

[5] Pickart L. The human tri-peptide GHK and tissue remodeling. Journal of Biomaterials Science, Polymer Edition. 2008;19(8):969-988. DOI: 10.1163/156856208784909435 PMID: 18644225. https://pubmed.ncbi.nlm.nih.gov/18644225/

[6] 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. Annals of Dermatology. 2016;28(4):438-443. DOI: 10.5021/ad.2016.28.4.438 PMID: 27489425. https://pmc.ncbi.nlm.nih.gov/articles/PMC4969472/

[7] Liu T, Liu Y, Zhao X, et al. Thermodynamically stable ionic liquid microemulsions pioneer pathways for topical delivery and peptide application. Bioactive Materials. 2023. DOI: 10.1016/j.bioactmat.2023.10.002 PMID: 38026438. https://pmc.ncbi.nlm.nih.gov/articles/PMC10643103/

[8] Hou G, et al. GHK Peptide Inhibits Bleomycin-Induced Pulmonary Fibrosis in Mice by Suppressing TGFbeta1/Smad-Mediated Epithelial-to-Mesenchymal Transition. Frontiers in Pharmacology. 2017;8:904. DOI: 10.3389/fphar.2017.00904 PMID: 29311918. https://pmc.ncbi.nlm.nih.gov/articles/PMC5733019/

[9] Zhang Q, Yan L, Lu J, Zhou X. Glycyl-L-histidyl-L-lysine-Cu2+ attenuates cigarette smoke-induced pulmonary emphysema and inflammation by reducing oxidative stress pathway. Frontiers in Molecular Biosciences. 2022;9:925700. DOI: 10.3389/fmolb.2022.925700 PMID: 35936787. https://pmc.ncbi.nlm.nih.gov/articles/PMC9354777/

[10] Deng M, Zhang Q, Yan L, et al. Glycyl-l-histidyl-l-lysine-Cu2+ rescues cigarette smoking-induced skeletal muscle dysfunction via a sirtuin 1-dependent pathway. Journal of Cachexia, Sarcopenia and Muscle. 2023. DOI: 10.1002/jcsm.13213 PMID: 36905132. https://pmc.ncbi.nlm.nih.gov/articles/PMC10235902/

[11] He Q, Mazzola J, Ladiges W. The naturally occurring peptide GHK reverses age-related fibrosis by modulating myofibroblast function. Aging Pathobiology and Therapeutics. 2024;6(4):186-190. DOI: 10.31491/apt.2024.12.158 PMID: 40823151. https://pmc.ncbi.nlm.nih.gov/articles/PMC12352503/

[12] Jiang F, Wu Y, Liu Z, Hong M, Huang Y. Synergy of GHK-Cu and hyaluronic acid on collagen IV upregulation via fibroblast and ex-vivo skin tests. Journal of Cosmetic Dermatology. 2023;22(9):2598-2604. DOI: 10.1111/jocd.15763 PMID: 37062921. https://pubmed.ncbi.nlm.nih.gov/37062921/

[13] Hostynek JJ, Dreher F, Maibach HI. Human skin penetration of a copper tripeptide in vitro as a function of skin layer. Inflammation Research. 2010. DOI: 10.1007/s00011-010-0238-9 PMID: 20721598. https://pmc.ncbi.nlm.nih.gov/articles/PMC3016279/

[14] Pickart L, Vasquez-Soltero JM, Margolina A. The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline. Brain Sciences. 2017;7(2):20. DOI: 10.3390/brainsci7020020 PMID: 28212278. https://pmc.ncbi.nlm.nih.gov/articles/PMC5332963/

[15] Tucker M, Keely A, Park JY, et al. Intranasal GHK peptide enhances resilience to cognitive decline in aging mice. Aging Pathobiology and Therapeutics. 2023. DOI: 10.1101/2023.11.16.567423 PMID: 38014118. https://pmc.ncbi.nlm.nih.gov/articles/PMC10680828/

[16] Mao S, Huang J, Li J, et al. Exploring the beneficial effects of GHK-Cu on an experimental model of colitis and the underlying mechanisms. Frontiers in Pharmacology. 2025;16:1551843. DOI: 10.3389/fphar.2025.1551843 PMID: 40672369. https://pubmed.ncbi.nlm.nih.gov/40672369/

[17] Kuceki M, Coppinger A, Ragi J, et al. Enhanced hair regrowth with five monthly sessions of minoxidil-dutasteride-copper peptides tattooing for androgenetic alopecia assessed by artificial intelligence and blinded evaluators. JAAD International. 2025. DOI: 10.1016/j.jdin.2025.01.012 PMID: 40225275. https://pmc.ncbi.nlm.nih.gov/articles/PMC11992372/

[18] Badenhorst T, Svirskis D, Merrilees M, Bolke L, Wu Z. Effects of GHK-Cu on MMP and TIMP Expression, Collagen and Elastin Production, and Facial Wrinkle Parameters. Journal of Aging Science. 2016;4:166. DOI: 10.4172/2329-8847.1000166. https://www.walshmedicalmedia.com/open-access/effects-of-ghkcu-on-mmp-and-timp-expression-collagen-and-elastin-production-and-facial-wrinkle-parameters-2329-8847-1000166.pdf

[19] Ogorek K, Nowak K, Wadych E, Ruzik L, Timerbaev AR, Matczuk M. Are We Ready to Measure Skin Permeation of Modern Antiaging GHK-Cu Tripeptide Encapsulated in Liposomes? Molecules. 2025;30(1):136. DOI: 10.3390/molecules30010136 PMID: 39795193. https://pmc.ncbi.nlm.nih.gov/articles/PMC11721469/

[20] 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. Oxidative Medicine and Cellular Longevity. 2012;2012:324832. DOI: 10.1155/2012/324832 PMID: 22666519. https://pmc.ncbi.nlm.nih.gov/articles/PMC3359723/

[21] Xu S, Zhou L, Zhao H, Li S. Advances in Transdermal Delivery Systems for Treating Androgenetic Alopecia. Pharmaceutics. 2025;17(8):984. DOI: 10.3390/pharmaceutics17080984 PMID: 40871007. https://pmc.ncbi.nlm.nih.gov/articles/PMC12389719/

[22] Ogorek K, Nowak K, Wadych E, Ruzik L, Timerbaev AR, Matczuk M. Are We Ready to Measure Skin Permeation of Modern Antiaging GHK-Cu Tripeptide Encapsulated in Liposomes? (stability data section). Molecules. 2025;30(1):136. DOI: 10.3390/molecules30010136 PMID: 39795193. https://pmc.ncbi.nlm.nih.gov/articles/PMC11721469/

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Plain-language summaries of the peer-reviewed copper-peptide record — cited study by study, chapter by chapter, sold by no one.