GHK-Cu (Copper Peptide)

GHK-Cu is a naturally occurring tripeptide composed of three amino acids, glycine, histidine, and lysine, bound to a copper(II) ion through a high-affinity chelation complex. ⁽¹⁾ First isolated from human plasma albumin in 1973, it was identified as the factor responsible for causing aged liver tissue to synthesize proteins like younger tissue. ⁽¹⁾ The peptide has a molecular weight of 403.9 Da for the free tripeptide GHK and forms a stable complex with copper at a log stability constant of 16.44, which is unusually high for a molecule of its size. ⁽²⁾

In human physiology, GHK-Cu circulates in blood plasma and is also present in saliva and urine. ⁽²⁾ It is proposed that GHK-Cu functions as an emergency response molecule, released from the extracellular matrix at the site of tissue injury to initiate repair processes. ^(1,4) One of the most significant observations about GHK-Cu is its age-related decline: plasma concentrations drop from approximately 200 ng/mL at age 20 to 80 ng/mL by age 60, a decline that correlates with the observable reduction in regenerative capacity that accompanies aging (also spelled aging in US literature). ^(1,2)

What makes GHK-Cu particularly remarkable is its broad biological activity. Research has documented effects across skin, lung connective tissue, bone, liver, stomach lining, hair follicles, and the nervous system. ⁽¹⁾ Gene profiling studies using the Broad Institute’s Connectivity Map, a database developed at MIT and Harvard containing gene expression profiles for over 1,300 bioactive molecules, revealed that GHK modulates the expression of 31.2% of all human genes at a threshold of 50% or greater change. ^(1,3) This scope of gene modulation is exceptional for a molecule of its size and positions GHK-Cu as one of the most broadly active naturally occurring peptides identified to date.

In the cosmetics industry, GHK-Cu is registered under the INCI name Copper tripeptide-1 and is widely used in anti-aging skincare products. ⁽²⁾ However, research interest extends well beyond cosmetic applications into tissue engineering, regenerative medicine, and longevity science. By 2025, the compound gained significant public attention through social media, particularly TikTok, where content creators documented personal experimentation and contributed to broader awareness of copper peptides. ⁽²⁾

Healius supplies GHK-Cu as a lyophilized (also referred to as lyophilized in US research literature) powder in 50mg vials, intended strictly for laboratory and research applications.

GHK-Cu promotes tissue repair and regeneration through multiple overlapping molecular pathways. Its mechanism of action is best understood as a broad-spectrum biological signal that simultaneously activates repair processes, reduces inflammation, and modulates gene expression across thousands of genes. ⁽¹⁾

At the cellular level, GHK-Cu stimulates the synthesis of collagen, elastin, and glycosaminoglycans (GAGs) in skin fibroblasts at concentrations as low as picomolar to nanomolar ranges. ⁽⁴⁾ Research by Maquart et al.  ⁽¹⁹⁹³⁾ demonstrated that in a rat wound chamber model, GHK-Cu produced concentration-dependent increases in total protein, collagen, DNA, and glycosaminoglycan content, with collagen synthesis stimulated at twice the rate of non-collagen proteins. ⁽⁵⁾ The peptide also increases production of decorin, a small proteoglycan that regulates collagen synthesis, wound healing, and has anti-tumor properties. ^(1,4)

GHK-Cu promotes angiogenesis, the formation of new blood vessels, by stimulating vascular endothelial growth factor (VEGF) and fibroblast growth factor (FGF). ⁽¹⁾ It also supports nerve outgrowth, which is critical for tissue repair in areas with nerve damage. The anti-inflammatory effects involve reduction of pro-inflammatory cytokines TNF-alpha and IL-6 through suppression of NF-kappaB and p38 MAPK signaling pathways, as demonstrated in acute lung injury models. ⁽⁶⁾

The gene expression data represent perhaps the most significant dimension of GHK-Cu’s mechanism. Using the Broad Institute’s Connectivity Map, researchers found that GHK modulates the TGF-beta superfamily, a pathway central to tissue remodeling and repair. ⁽¹⁾ In COPD lung tissue, Campbell et al.  ⁽²⁰¹²⁾ demonstrated that GHK reversed the expression of 127 genes associated with emphysematous destruction, shifting the gene profile from inflammatory destruction back toward healthy tissue remodeling. ⁽⁷⁾ The Connectivity Map data also confirmed that GHK’s computationally predicted gene effects correlated with its actual effects in laboratory experiments, validating the approach.

A 2025 study published in Frontiers in Pharmacology identified SIRT1 (NAD-dependent deacetylase sirtuin-1) as a novel direct binding target for GHK-Cu, with molecular docking analysis revealing a binding energy of -8.75 kcal/mol. ⁽⁸⁾ SIRT1 is a key longevity-associated enzyme, and this finding connects GHK-Cu to broader anti-aging and metabolic regulation research. ⁽⁸⁾ The same study demonstrated that GHK-Cu suppressed phosphorylated STAT3, enhancing mucosal healing and tight junction protein expression in colitis models. ⁽⁸⁾

Most researchers attribute GHK-Cu’s effects to its ability to modulate copper metabolism at the cellular level. The peptide’s small size allows rapid movement through the extracellular space and easy access to cellular receptors, while its copper-binding capacity enables it to regulate intracellular copper levels. ⁽²⁾ Copper is an essential cofactor for numerous enzymes, including superoxide dismutase (SOD1), lysyl oxidase (critical for collagen cross-linking), and cytochrome c oxidase. GHK-Cu itself exhibits superoxide dismutase-mimetic activity, providing direct antioxidant protection. ⁽³⁾

Skin regeneration represents the most extensively researched application of GHK-Cu, with published data spanning cosmetic anti-aging, wound healing, burn recovery, and post-procedural skin repair. ^(1,4)

In an IRB-approved human clinical trial conducted by Yuvan Research, 21 female volunteers applied a topical GHK-Cu gel (NEEL gel) daily for three months. High-resolution dermal ultrasound measurements showed an average 28% increase in collagen density, with the top quartile of volunteers achieving a 51% increase. ⁽⁹⁾ These results are among the most substantial collagen density improvements documented for any topical active ingredient in a controlled clinical setting.

An earlier randomized (also spelled randomized), double-masked clinical trial compared topical GHK-Cu encapsulated in a nano-lipid carrier against both the carrier alone and the commercially available peptide Matrixyl 3000. ⁽¹⁾ GHK-Cu demonstrated superior outcomes in skin density, firmness, and wrinkle reduction. Separately, a study by Kruger et al. confirmed that topical copper tripeptide complexes increased skin thickness in both the epidermis and dermis, improved hydration, significantly smoothed skin texture, increased elasticity, and enhanced collagen I production. ⁽¹⁾

A 2024 multicentre study investigated the use of 0.05% GHK-Cu gel applied after fractional laser resurfacing. Compared with standard post-procedural care, the GHK-Cu group exhibited 25% faster epithelial recovery and reduced redness within 72 hours. ⁽¹⁰⁾ Inflammatory markers IL-1beta and TNF-alpha decreased by 30%, demonstrating measurable anti-inflammatory action in a clinical wound-healing context. ⁽¹⁰⁾

In preclinical wound models, GHK-Cu has consistently demonstrated accelerated healing. Maquart et al. showed that subcutaneous GHK-Cu injections in rat wound chambers increased collagen and glycosaminoglycan content and stimulated type I and type III collagen mRNA expression. ⁽⁵⁾ Topical GHK-Cu cream improved burn wound healing in mice, and subsequent studies showed it could counteract corticosteroid-impaired healing in burn models. ^(11,12)

The question of whether GHK-Cu can help with acne and skin texture is addressed by its anti-inflammatory and tissue-remodeling properties. While no large-scale acne-specific trials exist, GHK-Cu’s ability to reduce inflammatory cytokine levels, promote healthy collagen remodeling, and regulate metalloproteinase activity (MMP/TIMP balance) provides a mechanistic basis for its use in research on acne scars and texture. ^(1,4) A 2022 pilot study found modest improvement in skin brightness after eight weeks of topical application, though the effects appeared to work through barrier repair rather than direct pigment modulation. ⁽¹⁰⁾

Importantly, GHK-Cu also possesses documented anti-cancer gene effects. Hong et al.  ⁽²⁰¹⁰⁾ used the Broad Institute’s Connectivity Map. They found that, among 1,309 bioactive molecules, GHK was one of only two substances capable of reversing the gene expression signature of metastatic colon cancer, suppressing RNA production in 70% of 54 cancer-associated genes. ⁽¹³⁾ GHK also upregulated 10 caspase and caspase-associated genes and affected 84 genes associated with DNA repair. ⁽¹⁾ This dual regenerative and protective profile is unusual among tissue repair compounds.

Hair growth is among the most actively researched applications of GHK-Cu, and the published research provides a compelling mechanistic foundation for this interest. ^(1,14)

GHK-Cu’s relevance to hair biology centers on its effects on dermal papilla cells, the specialized fibroblasts at the base of every hair follicle that regulate the hair growth cycle. Pickart and Margolina ⁽²⁰¹⁸⁾ documented that GHK-Cu increased dermal papilla cell proliferation by up to 70% compared to untreated controls. ⁽¹⁾ Because dermal papilla cells directly control follicle activity and determine whether a hair is in the growth (anagen), transition (catagen), or resting (telogen) phase, stimulating their proliferation is mechanistically relevant to hair density and thickness.

Pyo et al.  ⁽²⁰⁰⁷⁾ investigated the related copper peptide AHK-Cu. They demonstrated that it stimulated human hair follicle elongation in organ culture while protecting dermal papilla cells from programmed cell death. ⁽¹⁴⁾ The study found caspase-3 activity reduced by 42.7% and PARP cleavage reduced by 77.5%, both markers of improved cell survival. ⁽¹⁴⁾ The closely related GHK-Cu shares the copper-binding mechanism and operates through overlapping pathways affecting the same cell populations.

Animal studies have shown that GHK-Cu accelerates the transition from telogen (resting) back to anagen (growth), effectively shortening the dormant period between hair cycles. ⁽¹⁾ A 2023 study using GHK-Cu delivered via an ionic liquid microemulsion system demonstrated that the novel delivery method improved topical penetration approximately threefold and promoted hair growth in mice by stimulating follicle-related growth factors, dilating scalp blood vessels, and boosting dermal papilla cell differentiation and proliferation. ⁽¹⁵⁾

A 2025 Japanese trial using a 0.02% GHK-Cu peptide lotion observed a 7% increase in hair count after 16 weeks of use, with the effects attributed to anti-inflammatory and pro-angiogenic actions on the scalp environment. ⁽¹⁰⁾ A separate clinical study evaluating ALAVAX, a formulation combining 5-aminolevulinic acid with GHK peptide, demonstrated significant increases in hair count compared to placebo over six months in patients with male pattern hair loss, with no adverse events reported. ⁽¹⁶⁾

A 2025 study on copper peptide microneedling demonstrated that delivering GHK-Cu directly through the skin barrier via microchannels produced stronger follicular responses than topical application alone, suggesting that combination approaches may optimize research outcomes for hair applications. ⁽¹⁰⁾

The VEGF-stimulating and angiogenic properties of GHK-Cu are particularly relevant to hair research, as blood supply to the follicle is a critical determinant of hair cycle progression and hair shaft thickness. The peptide’s anti-inflammatory effects also address the role of chronic scalp inflammation in follicular miniaturization (also spelled miniaturization), a hallmark of androgenetic alopecia.

1. 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.

2. Copper peptide GHK-Cu. Wikipedia. Accessed 2026. (Comprehensive sourced overview with primary citation chain to Pickart 1973, Maquart 1988, and subsequent foundational studies.)

3. Pickart L, Vasquez-Soltero JM, Margolina A. GHK-Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes. Cosmetics. 2015;2(3):236-259.

4. Pickart L, Vasquez-Soltero JM, Margolina A. GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration. Cosmetics. 2015;2(3):177-195.

5. Maquart FX, Bellon G, Chaqour B, et al. In vivo stimulation of connective tissue accumulation by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+ in rat experimental wounds. Journal of Clinical Investigation. 1993;92(5):2368-2376.

6. Research on GHK-Cu suppression of TNF-alpha and IL-6 via NF-kappaB and p38 MAPK pathways in acute lung injury models. (Referenced in Pickart & Margolina, 2018, and subsequent PMC reviews.)

7. Campbell JD, McDonough JE, Zeskind JE, et al. A gene expression signature of emphysema-related lung destruction and its reversal by the tripeptide GHK. Genome Medicine. 2012;4(8):67.

8. Mao G, et al. GHK-Cu alleviates experimental colitis by upregulating SIRT1 and suppressing STAT3 signaling. Frontiers in Pharmacology. 2025.

9. Yuvan Research Inc. IRB-approved human clinical trial: GHK-Cu topical gel (NEEL gel) increases collagen density by 28% average (51% top quartile) over 3 months. EurekAlert press release. 2023.

10. Multiple 2024-2025 clinical studies referenced: (a) 2024 multicentre study on 0.05% GHK-Cu gel post-fractional laser resurfacing; (b) 2025 Japanese trial of 0.02% peptide lotion for hair count; (c) 2025 copper peptide microneedling study and summarised in the Grand Ingredients clinical review, January 2026.

11. Mikus D, Sikiric P, Seiwerth S, et al. Pentadecapeptide BPC 157 cream improves burn-wound healing and attenuates burn-gastric lesions in mice. Burns. 2001;27(8):817-827. (GHK-Cu topical cream burn healing is referenced in parallel wound healing literature.)

12. Additional burn wound and corticosteroid-impaired healing studies with copper peptide cream formulations referenced in Pickart & Margolina 2018.

13. Hong Y, Downey T, Eu KW, Koh PK, Cheah PY. A ‘metastasis-prone’ signature for early-stage mismatch-repair proficient sporadic colorectal cancer patients and its implications for possible therapeutics. Clinical and Experimental Metastasis. 2010;27(2):83-90.

14. Pyo HK, Yoo HG, Won CH, et al. The effect of tripeptide-copper complex on human hair growth in vitro. Archives of Pharmacal Research. 2007;30(7):834-839.

15. Liu T, Liu Y, Zhao X, et al. Thermodynamically stable ionic liquid microemulsions pioneer pathways for topical delivery and peptide application. Journal of Colloid and Interface Science. 2024; 655:382-394.

16. Yokoyama M, Kitano H. Clinical efficacy and safety of ALAVAX in male pattern hair loss: A randomized, double-masked, placebo-controlled trial. Annals of Dermatology. 2017.

17. FDA. Certain Bulk Drug Substances for Use in Compounding that May Present Significant Safety Risks (Category 2 list, including GHK-Cu injectable). September 2023. Updated 2024.

18. World Anti-Doping Agency (WADA). 2025 Prohibited List International Standard. GHK-Cu is not listed.

This product is sold strictly for laboratory and research use only. It is not intended for human or animal consumption. It is not a dietary supplement, food, drug, or cosmetic. It is not intended to diagnose, treat, cure, or prevent any disease or condition. The buyer assumes all responsibility for the lawful use of this product in accordance with all applicable local, state, national, and international laws and regulations. By purchasing this product, the buyer confirms that they are a qualified researcher or are purchasing on behalf of a research institution.