50+ years of independent
GHK-Cu research.
Every study below was funded and conducted independently — by dermatologists, biochemists, and research institutions with no connection to Koppā. We didn't run these studies. We built our formulas around what they found. Each entry links to the published source.
50+ years of published research.
Organised by benefit area. Every study was conducted independently — by dermatologists, biochemists, and research institutions with no connection to KOPPĀ. Each entry links directly to the published source.
Isolation of GHK from Human Plasma
The study that started everything. Biochemist Loren Pickart discovered that when blood plasma from young donors was added to liver cells from older donors, the older cells began functioning like younger tissue. The active compound responsible was isolated and identified as GHK — a tripeptide naturally present in human blood.
GHK-Cu Stimulation of Collagen, Glycosaminoglycans, and Wound Repair
In animal and cell models, GHK-Cu significantly stimulated the production of collagen, proteoglycans, and glycosaminoglycans — the structural building blocks of skin. The peptide also promoted angiogenesis and accelerated wound closure. This was the foundational evidence for GHK-Cu's role in skin repair.
Comparative Trial: GHK-Cu vs. Vitamin C vs. Retinoic Acid for Collagen Production
A human trial comparing topical GHK-Cu against vitamin C and retinoic acid (prescription retinoid). After one month of daily application, GHK-Cu produced collagen increases in 70% of participants — outperforming both vitamin C (50%) and retinoic acid (40%).
GHK-Cu Facial Cream for Photoaged Skin
71 women with mild to advanced photoaging applied a GHK-Cu cream twice daily for 12 weeks. The treatment group showed statistically significant improvements in skin density, skin thickness, fine lines, and laxity compared to both placebo and vitamin C control groups.
GHK-Cu Eye Cream for Periorbital Wrinkles
41 women with photodamage around the eye area used a GHK-Cu eye cream for 12 weeks. The treatment reduced periorbital wrinkles and outperformed both placebo and vitamin K cream for improving skin density and firmness around the eyes.
Epidermal and Dermal Thickening with GHK-Cu
67 women applied GHK-Cu cream twice daily for 12 weeks. In this study on GHK-Cu, researchers reported measurable changes in epidermal and dermal thickness, associated with improvements in the look of firmness rather than surface hydration alone.
GHK-Cu Nano-Carrier Delivery for Wrinkle Reduction
GHK-Cu delivered via nano-lipid carriers was tested against a Matrixyl 3000 control serum. Over 8 weeks, the GHK-Cu formulation reduced facial wrinkle volume by 55.8% and wrinkle depth by 32.8%. The study also confirmed GHK-Cu increased collagen and elastin at concentrations as low as 0.01 nM.
Clinical Trial: GHK-Cu Topical Gel for Collagen Density
21 women applied a GHK-Cu topical gel daily for 3 months. On average, participants saw a 28% increase in collagen density. The top quartile experienced a 51% increase — one of the most significant collagen improvements documented for a topical peptide product.
GHK-Cu for Post-Laser Skin Recovery
Patients recovering from CO2 laser resurfacing were treated with topical GHK-Cu. The treatment group healed faster and showed improved wound closure compared to standard post-procedure care — suggesting GHK-Cu can accelerate the skin's natural repair process after controlled damage.
GHK-Cu Wound Healing in Ischemic Tissue
Full-thickness wounds were treated daily with topical GHK-Cu for 13 days. Wound size decreased by 64.5% in the GHK-Cu group versus just 28.2% in untreated controls — demonstrating the peptide's ability to accelerate healing even in compromised, low blood-flow tissue.
GHK-Cu Systemic Healing Enhancement
Across multiple animal studies, GHK-Cu demonstrated an unexpected systemic effect: when applied in one area of the body, it improved healing at distant body sites. These treatments increased collagen production, angiogenesis, and wound closure — suggesting GHK-Cu triggers a body-wide repair response, not just a local one.
Gene Expression Profiling of GHK-Cu
Using the Broad Institute's Connectivity Map, researchers analyzed how GHK-Cu affects human gene expression at the cellular level. In this study on the GHK-Cu molecule, the peptide was reported to influence a large share of human genes, shifting many age-related expression patterns. Of the affected genes, 59% were upregulated and 41% were downregulated — spanning pathways studied for their role in tissue and collagen biology.
Anti-Inflammatory and Antioxidant Actions of GHK-Cu
A comprehensive review confirmed that GHK-Cu suppresses pro-inflammatory signals (including IL-6 and TNF-α), reduces oxidative damage markers, and upregulates the body's antioxidant defense enzymes. The authors also documented the age-related decline in plasma GHK-Cu levels and its correlation with reduced regenerative capacity across multiple organ systems.
13 studies. 50 years of independent research. One molecule your body already knows how to use.
Start Your Protocol →The research is published.
50 years of independent science behind one peptide your body already recognizes. See how we formulate with it.