# Reading list

> Reading list — Pretty Skin Clinics — The Pretty Skin Clinics reading list covers published GHK-Cu research on collagen, tissue remodeling, topical skin outcomes, delivery and gene expression.

The cell experiments and the topical reviews make good company, provided each gets to answer its own question.

## Collagen and remodeling

Begin with the [collagen-synthesis experiment in human fibroblasts](https://pubmed.ncbi.nlm.nih.gov/3169264/). Its observation that collagen production changed independently of cell number is particularly compelling to me. The [tissue-remodeling review](https://pubmed.ncbi.nlm.nih.gov/18644225/) and [skin-regeneration review](https://pmc.ncbi.nlm.nih.gov/articles/PMC4508379/) put synthesis into a wider account of tissue material and topical skin outcomes.

## Topical delivery and skin outcomes

The [anti-wrinkle review](https://pmc.ncbi.nlm.nih.gov/articles/PMC11830136/) discusses efficacy and the difficulty of getting GHK through the skin barrier together. The [skin-layer copper-penetration experiment](https://pmc.ncbi.nlm.nih.gov/articles/PMC3016279/) follows copper applied as GHK-Cu through human skin examined outside the body. I value the physical specificity of that delivery question.

## Gene signatures

The [gene-data review](https://pmc.ncbi.nlm.nih.gov/articles/PMC6073405/) considers a broad expression signature, drawing on database and laboratory work. Its threshold and the distinction between the reported gene counts deserve attention alongside the scope of the result.

## References

[1] Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+ https://pubmed.ncbi.nlm.nih.gov/3169264/
[2] The human tri-peptide GHK and tissue remodeling https://pubmed.ncbi.nlm.nih.gov/18644225/
[3] GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration https://pmc.ncbi.nlm.nih.gov/articles/PMC4508379/
[4] Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospective https://pmc.ncbi.nlm.nih.gov/articles/PMC11830136/
[5] Human skin penetration of a copper tripeptide in vitro as a function of skin layer https://pmc.ncbi.nlm.nih.gov/articles/PMC3016279/
[6] Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data https://pmc.ncbi.nlm.nih.gov/articles/PMC6073405/

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Pretty Skin Clinics is my small bulletin on published research about skin, an editorial site with no clinical business behind its name and no medical advice in its pages.