Research Brief
GHK-Cu: Research Overview
A naturally occurring copper-binding tripeptide studied in preclinical models for skin regeneration, tissue repair, and anti-aging — widely used in cosmetics, but lacking human clinical efficacy trials for most claims.
Last reviewed: June 2, 2026
For Laboratory Research Use Only
Content on this page describes published research findings. LUMEN BASED does not make therapeutic claims. Consult the primary literature and your institutional review board for protocol design. These products are not for human consumption.
What is GHK-Cu?
GHK is a naturally occurring tripeptide (glycyl-L-histidyl-L-lysine) that binds copper; "GHK-Cu" is its copper complex. Endogenous GHK levels decline with age — from roughly 200 ng/ml around age 20 to about 80 ng/ml by 60. [Dou 2020] It is one of the most-studied "copper peptides" and a common cosmetic ingredient, though the systemic and therapeutic research is overwhelmingly preclinical and it is not an approved drug.
What the research has investigated
Skin & gene regulation
Reviews describe GHK stimulating collagen synthesis and tissue repair, and report that in cell studies it can up- or down-regulate thousands of human genes. [Pickart 2018; Pickart 2015]
Anti-aging & antioxidant activity
In cell and animal models GHK shows antioxidant and anti-inflammatory activity, with preliminary reports of partially reversing cognitive impairment in aging mice. [Dou 2020]
Anti-wrinkle — and an honest gap
A 2025 review finds cellular support for anti-wrinkle effects but notes a "surprising absence of clinical studies" validating efficacy in humans. [Mortazavi 2025]
Fibrosis & skeletal muscle
In mouse models, GHK-Cu reduced lung inflammation and fibrosis in silicosis (with no significant systemic toxicity reported) [Bian 2024], and restored cigarette-smoke-induced skeletal-muscle dysfunction via a SIRT1 pathway, with lower plasma GHK observed in COPD patients (n=20). [Deng 2023]
The state of the evidence
GHK-Cu has broad preclinical support and is widely used as a cosmetic ingredient, but human clinical efficacy trials are largely absent for its therapeutic claims. [Mortazavi 2025]
For research use only
LUMEN BASED supplies GHK-Cu strictly for laboratory and research use. It is not a drug, supplement, or therapeutic product, is not intended for human or veterinary use, and nothing on this page is medical advice or a claim of clinical benefit. Every reference below links to its primary source on PubMed for independent verification.
Verify the batch you're studying
Each GHK-Cu lot ships with a third-party Certificate of Analysis (HPLC, mass spectrometry, identity confirmation). Pair the batch in your study with the matching COA before publishing or reporting results.
View COA for GHK-Cu →References
- Pickart L et al. (2018). Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data. PubMed
- Pickart L et al. (2015). GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration. PubMed
- Dou Y et al. (2020). The potential of GHK as an anti-aging peptide. PubMed
- Mortazavi SM et al. (2025). Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospective. PubMed
- Bian Y et al. (2024). The glycyl-l-histidyl-l-lysine-Cu(2+) tripeptide complex attenuates lung inflammation and fibrosis in silicosis by targeting peroxiredoxin 6. PubMed
- Deng M et al. (2023). Glycyl-l-histidyl-l-lysine-Cu(2+) rescues cigarette smoking-induced skeletal muscle dysfunction via a sirtuin 1-dependent pathway. PubMed
For Research Use Only. All LUMEN BASED compounds are strictly for in vitro laboratory research by qualified researchers. Not for human or animal consumption. Not approved by the FDA for therapeutic use.