# What Studies Stand Behind the Skin Claims

> References: Papers Behind the Skin Results — Papers behind the GHK-Cu and GLOW findings, with names and links. Small human studies, animal studies, and cells in dishes leave different questions open.

**What the papers actually support**

A promise of firmer skin can outrun the study behind it. The papers below give you the findings behind these claims.

## What the cited papers can help you judge

A skin claim can promise more than researchers actually found. Small human groups, animals, and cells in dishes answer different questions. A skin product also differs from a compound given through shots. Those differences affect how much a result can establish for you.

The papers behind the [GHK-Cu](/ghk-cu), [GLOW blend](/glow), [comparison](/compare), and [questions](/faq) pages appear below. A numbered mark beside a finding points to the matching paper. Each entry names the writers, journal, year, and identifying details. The link opens the paper or the summary published with it.

A listed study isn't a promise that a treatment will help.

Human skin findings mainly concern small studies of skin products. Many repair findings concern animals or cells kept alive outside the body. Those findings can't settle how your body responds to treatment. The tested people and product still matter, as does how the compound was given.

## References

[1] Mortazavi SM, Mohammadi Vadoud SA, Moghimi HR. Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospective. BioImpacts. 2025;15:30071. https://pmc.ncbi.nlm.nih.gov/articles/PMC11830136/
[2] 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. https://pmc.ncbi.nlm.nih.gov/articles/PMC6073405/
[3] 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. https://pmc.ncbi.nlm.nih.gov/articles/PMC4969472/
[4] 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. https://pmc.ncbi.nlm.nih.gov/articles/PMC4508379/
[5] Hostynek JJ, Dreher F, Maibach HI. Human skin penetration of a copper tripeptide in vitro as a function of skin layer. Inflammation Research. 2011;60(1):79-86. https://pmc.ncbi.nlm.nih.gov/articles/PMC3016279/
[6] Pickart L. The human tri-peptide GHK and tissue remodeling. Journal of Biomaterials Science, Polymer Edition. 2008;19(8):969-988. https://pubmed.ncbi.nlm.nih.gov/18644225/
[7] 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. https://pubmed.ncbi.nlm.nih.gov/3169264/
[8] Mendias CL, Awan TM. Safety and Efficacy of Approved and Unapproved Peptide Therapies for Musculoskeletal Injuries and Athletic Performance. Sports Medicine. 2026. https://pubmed.ncbi.nlm.nih.gov/41966639/
[9] McGuire FP, Martinez R, Lenz A, Skinner L, Cushman DM. Regeneration or Risk? A Narrative Review of BPC-157 for Musculoskeletal Healing. Current Reviews in Musculoskeletal Medicine. 2025. https://pubmed.ncbi.nlm.nih.gov/40789979/
[10] Hsieh MJ, et al. Therapeutic potential of pro-angiogenic BPC157 is associated with VEGFR2 activation and up-regulation. Journal of Molecular Medicine (Berlin). 2017;95:323-333. https://pubmed.ncbi.nlm.nih.gov/27847966/

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A literature digest — what the published science says about copper-peptide and aesthetic-blend research, not what to buy or do.