GHK-Cu — Obsidian Peptides

Research Status:Pre-Clinical Studies

Extensive preclinical gene expression and wound healing data; human evidence limited to cosmetic dermatology studies

This content summarizes published research for educational purposes. It is not medical advice.

Research summary based on 9 peer-reviewed sources•Last updated: February 10, 2026•View references ↓

A Gene Regulatory Network Modulator

A copper-delivery complex that shifts cellular programs from defense-oriented states toward tissue maintenance. Microarray studies show GHK-Cu influencing over 4,000 human genes — not a single-target molecule but a broad regulator of tissue remodeling.³

What Makes It Distinctive in the Collagen Space

Quality, not just quantity — copper activates lysyl oxidase, which cross-links collagen fibers for mechanical strength PubMed
Matrix remodeling — degrades damaged tissue while building organized replacement PubMed
Anti-inflammatory — suppresses IL-6, TNF-α, and oxidative stress markers PubMed
Cross-tissue effects — similar gene patterns in skin, lung, and other tissues PubMed

Plasma levels drop from ~200 μg/mL at age 20 to ~80 μg/mL by age 60 — a 60% reduction that correlates with slower wound healing and reduced tissue repair capacity. This decline may represent a fundamental shift in tissue maintenance capacity.²

Collagen Synthesis

In dermal fibroblast cultures, GHK-Cu stimulated synthesis of collagen types I and III, decorin, and glycosaminoglycans. Quantitative assays measured increased hydroxyproline and procollagen peptide levels.¹²

Wound Healing

In rodent full-thickness wound and burn models, GHK-Cu accelerated wound contraction, enhanced angiogenesis, and increased microvessel density in healing tissue.¹²

Anti-Inflammatory Effects

In macrophage cultures, GHK-Cu reduced secretion of IL-6 and TNF-α. The peptide also influenced superoxide dismutase and ferritin heavy chain expression — suggesting coordinated regulation of inflammatory signaling and oxidative stress.³

Gene Expression in COPD

GHK-Cu's gene regulatory effects extend beyond skin. In COPD lung tissue, microarray studies show similar patterns — hundreds of genes involved in remodeling, inflammation, and matrix organization responding to the peptide. A Broad Institute Connectivity Map study demonstrated that GHK reversed the gene-expression signature of emphysematous destruction.³⁴⁷

MMP/TIMP Balance

GHK-Cu regulates expression of metalloproteinases and their inhibitors in fibroblasts, providing mechanistic evidence for ECM remodeling capacity.⁸

Cosmetic Dermatology

Clinical studies have evaluated topical GHK-Cu on skin architecture. Histological analyses documented changes in collagen organization and dermal density. Quantitative measures of wrinkle depth and skin elasticity showed improvements versus placebo.

Laser Resurfacing (2006): Controlled study on CO₂ laser-resurfaced skin showed mixed objective outcomes but higher patient satisfaction.

Wrinkle Reduction (2016): 8-week RCT with GHK-Cu in nano-lipid carrier demonstrated 55.8% wrinkle volume reduction versus control; 31.6% versus Matrixyl 3000.⁵⁶

These cosmetic trials provide the primary human data supporting GHK-Cu's effects on tissue quality.

GHK-Cu has well-characterized mechanisms and robust preclinical evidence. Human data are largely confined to topical cosmetic applications.

The age-related decline in circulating GHK-Cu has been documented. Whether supplementation reverses age-associated tissue changes in humans has not been established through rigorous clinical trials.

For laboratory research use only.

Pickart L et al. "GHK peptide as a natural modulator of multiple cellular pathways in skin regeneration." BioMed Res Int. 2015;2015:648108. PubMed
Pickart L. "The human tri-peptide GHK and tissue remodeling." J Biomater Sci Polym Ed. 2008;19(8):969-988. PubMed
Pickart L & Margolina A. "Regenerative and protective actions of the GHK-Cu peptide in the light of the new gene data." Int J Mol Sci. 2018;19(7):1987. PubMed
Pickart L et al. "GHK and DNA: resetting the human genome to health." BioMed Res Int. 2014;2014:151479. PubMed
Gorouhi F & Bhutani T. "A systematic review of randomized trials for cosmeceutical treatments in aged skin." J Dermatolog Treat. 2015;26(3):193-200. PubMed
Leyden J et al. "Effects of Topical Copper Tripeptide Complex on CO₂ Laser-Resurfaced Skin." Arch Facial Plast Surg. 2006. PubMed
Campbell JD et al. "A Gene Expression Signature of Emphysema-Related Lung Destruction and Its Reversal by GHK." Genome Med. 2012. PubMed
Siméon A et al. "GHK-Cu Regulates Expression of Metalloproteinases and Their Inhibitor in Fibroblasts." Matrix Biol. 2000. PubMed

Amino Acid Sequence	Gly-His-Lys
Single-Letter Code	GHK
Molecular Formula	C14H22CuN6O4
Molecular Weight	401.93 g/mol
Amino Acid Count	3
CAS Number	49557-75-7
PubChem CID	73587
Origin	Naturally occurring copper-binding tripeptide (glycyl-L-histidyl-L-lysine) first isolated from human plasma, forming a high-affinity complex with copper(II) ions that modulates extracellular matrix remodeling and gene expression
Synonyms	Copper Peptide, GHK-Cu, Glycyl-L-histidyl-L-lysine:copper(II), Lamin, Prezatide copper acetate

GHK-Cu