GHK-Cu
GHK-Cu is a naturally occurring copper-binding tripeptide (glycyl-L-histidyl-L-lysine) whose tissue levels decline with age, studied extensively in vitro and in animal and human skin research for effects on collagen remodeling, antioxidant activity, and anti-inflammatory gene expression, with topical cosmetic use carrying the strongest human evidence.
This page is a research-orientation summary, not a dosing guide. For anything beyond general background, read the primary literature or talk to a qualified clinician — specifics like amount, frequency, or administration aren't something we publish here.
What it does & how it works
GHK-Cu has high binding affinity for copper(II) and functions in part as a copper-delivery and chelation system that supports lysyl oxidase-dependent collagen and elastin cross-linking. Broader gene-expression profiling studies indicate GHK-Cu can shift expression of large sets of genes involved in extracellular matrix remodeling, antioxidant defense, and anti-inflammatory signaling, and it has been shown to stimulate fibroblast and keratinocyte activity while modulating the balance of matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) in skin.
Typical results seen in research
In cell culture and animal studies, GHK-Cu increases collagen and glycosaminoglycan synthesis, supports wound closure, and shows antioxidant and anti-inflammatory activity, including benefit reported in an experimental model of colitis. In humans, topical GHK-Cu formulations have shown modest improvements in skin firmness, fine lines, and photoaging measures in small dermatology studies, but large, rigorous human trials — particularly for any systemic or non-topical use — are lacking.
How it’s commonly used
GHK-Cu is most commonly used topically, formulated into creams or serums for skin-focused research and cosmetic applications; in preclinical research it has also been administered systemically (for example, intraperitoneally or intranasally in rodent studies) to investigate broader physiological and central nervous system effects.
- International Journal of Molecular Sciences · 2018 Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data
- Frontiers in Pharmacology · 2025 Exploring the beneficial effects of GHK-Cu on an experimental model of colitis and the underlying mechanisms
- Molecules · 2025 Are We Ready to Measure Skin Permeation of Modern Antiaging GHK-Cu Tripeptide Encapsulated in Liposomes?
Curated from published literature for research orientation. Not an exhaustive review, and not a substitute for reading primary sources.
- Copper Peptides Get a Next-Generation Delivery Upgrade, Dermatology Press Reports —
- Exploring the Role of Tripeptides in Wound Healing and Skin Regeneration: A Comprehensive Review —