GHK-Cu
Copper Peptide · Skin Regeneration & Anti-Aging Compound
Naturally occurring copper tripeptide found in human plasma, saliva, and urine. GHK-Cu affects 31.2% of human genes and declines significantly with age—from ~200 ng/ml at age 20 to ~80 ng/ml at age 60. Known for exceptional skin regeneration, wound healing, and anti-aging properties.
Overview
Naturally occurring copper tripeptide found in human plasma, saliva, and urine. GHK-Cu affects 31.2% of human genes and declines significantly with age—from ~200 ng/ml at age 20 to ~80 ng/ml at age 60. Known for exceptional skin regeneration, wound healing, and anti-aging properties.
Penetrates skin layers, activates fibroblasts, stimulates collagen and elastin synthesis, promotes angiogenesis, and modulates inflammatory responses. The copper ion is essential for enzyme cofactor activity in tissue repair processes.
Research indications
What the compound has been studied for, grouped by body system. Effect size is the reported magnitude where it was measured — not a recommendation.
Increases type I and III collagen production by up to 70% in human dermal fibroblasts.
Stimulates elastin synthesis for improved skin elasticity and resilience.
Strengthens protective barrier and improves moisture retention.
Promotes hair follicle enlargement and extends anagen (growth) phase.
Improves scalp circulation and reduces inflammation.
Regulates inflammatory cytokine production.
Protects tissues from oxidative stress and damage.
A large effect in a weak study and a small effect in a strong one are different things. Effect size is never evidence of use in people.
- Class
- Copper tripeptide
- Chain length
- 3 residues
- Molecular weight
- 404.96 Da
- Half-life
- ~1.25 h
- Typical dose
- 0.5-2% topical or 1-3mg injectable
- Frequency
- 1-2x daily
- Cycle length
- 8-16 weeks
- Storage
- Room temperature (topical) or 2-8°C (injectable)
Molecular data
- Type
- Copper tripeptide
- Molecular weight
- 404.96 Da
- Chain length
- 3 residues
- Half-life
- 75 min
GHKDosing reference
Doses reported in the literature and by suppliers. These are a record of what has been used in research — reference, never instruction.
| Context | Route | Amount | Frequency |
|---|---|---|---|
| Anti-aging skincare | Topical application | 0.5-1% cream | 1-2x daily |
| Hair growth stimulation | Scalp massage | 1-2% solution | 1x daily |
| Wound healing | Direct application | 1-2% gel | 2-3x daily |
| General skin health | Face and neck | 0.5% serum | 1x daily |
| Intensive repair | Targeted areas | 2% cream | 1x daily |
| Systemic anti-aging | SubQ | 1-2mg | 1x daily |
| Enhanced regeneration | SubQ | 2-3mg | 1-2x daily |
Interactions
Complementary tissue healing and regeneration pathways.
Enhanced wound healing and tissue repair when combined.
Both affect melanin production; use caution when combining.
Risk of copper toxicity; do not combine with oral copper supplements.
No known interactions.
May affect copper absorption and activity.
Quality checklist
- ✓Light blue tint from copper content
- ✓Smooth texture, non-gritty
- ✓Stable formulation without separation or crystallization
- ✓Professional packaging with UV protection
- !Slight color variation acceptable within blue spectrum
- ×Green or dark discoloration (oxidation/contamination)
- ×Grainy texture (poor formulation or crystallization)
- ×Separation or settling of components
What to expect
Safety
- Mild skin irritation initially (usually resolves)
- Increased photosensitivity
- Severe skin irritation, burning, or persistent redness
- Allergic reactions (rash, swelling, difficulty breathing)
- Unusual skin discoloration or staining
- Persistent metallic taste (injectable)
- Worsening of skin condition after 4-6 weeks
- Known copper sensitivity or Wilson's disease
- Active skin infections at application site
- Pregnancy or breastfeeding (injectable)
FAQ
How much does GHK-Cu decline with age and why does that matter?
GHK-Cu levels drop dramatically from ~200 ng/ml at age 20 to ~80 ng/ml at age 60—a 60% decline. Since GHK-Cu affects 31.2% of human genes, this decline contributes significantly to aging phenotypes. Supplementation aims to restore youthful peptide levels and potentially reverse age-related gene expression changes.
Is topical GHK-Cu effective or should I inject it?
Topical GHK-Cu (0.5-2% creams/serums) is effective for skin applications with visible improvements in collagen, elastin, fine lines, and skin texture. Injectable forms (1-3mg SubQ) provide systemic benefits but lack FDA approval. For skin-focused anti-aging, topical is convenient and well-researched; for systemic effects, injection is more bioavailable.
Can I safely combine GHK-Cu topically with retinoids?
GHK-Cu can be combined with retinoids but may increase skin sensitivity and irritation, requiring careful introduction. Start with lower GHK-Cu concentrations (0.5%) and alternate retinoid use, or apply them on different days. Patch testing is essential before full-face combined use.
How long does it take to see visible skin improvements with GHK-Cu?
Timeline for topical GHK-Cu: improved hydration in weeks 1-2, reduction in fine lines by weeks 3-4, noticeable elasticity improvements by weeks 6-8, and peak anti-aging effects by weeks 8-12. Hair growth benefits take longer—typically 6-12 weeks for initial follicle stimulation effects.
References
- 1The human tripeptide GHK-Cu in prevention of oxidative stress and degenerative conditions of aging: implications for cognitive healthPickart, L., Vasquez-Soltero, J.M., Margolina, A. · Oxidative Medicine and Cellular Longevity · 2012
GHK possesses antioxidant, anti-inflammatory, and wound healing properties; regulates genes critical for neuronal development and maintenance; implications for cognitive health in aging.
reviewPubMed 22666519 ↗ - 2GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin RegenerationPickart, L., Vasquez-Soltero, J.M., Margolina, A. · BioMed Research International · 2015
GHK-Cu stimulates synthesis of collagen, dermatan sulfate, chondroitin sulfate, and decorin; tightens loose skin, improves elasticity, density, and firmness; reduces fine lines, wrinkles, and photodamage.
reviewPubMed 26236730 ↗ - 3Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene DataPickart, L., Margolina, A. · International Journal of Molecular Sciences · 2018
Broad regenerative potential demonstrated across skin, lung, bone, liver, and stomach tissue; cell protective actions including anti-cancer, anti-inflammatory, DNA repair, and proteasome activation via gene modulation.
reviewPubMed 29986520 ↗ - 4Tripeptides GHK and GHK-Cu-modified silver nanoparticles for enhanced antibacterial and wound healing activitiesIslam, R., Bilal, H., Wang, X., Zhang, L. · Colloids and Surfaces B: Biointerfaces · 2024
GHK and GHK-Cu modified silver nanoparticles demonstrated enhanced antibacterial activity and accelerated wound healing through improved delivery and bioactivity.
reviewPubMed 38387323 ↗ - 5Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospectiveMortazavi, S.M., Mohammadi Vadoud, S.A., Moghimi, H.R. · BioImpacts · 2024
Comprehensive review confirming GHK and Pal-GHK effectiveness as anti-wrinkle ingredients; skin permeability can be enhanced via metal complexation, chemical modification, and cell-penetrating peptides.
reviewPubMed 39963574 ↗