GHK-Cu
Copper Peptide | Skin Regeneration & Anti-Aging Compound
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.
Key benefits
- Enhanced collagen production (70% increase in type I and III)
- Improved skin elasticity
- Reduced fine lines and wrinkles
- Accelerated wound healing
- Hair growth stimulation
- Antioxidant protection
Mechanism of action
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.
Molecular data
- Type
- Copper tripeptide
- Half-life
- 0.5-2 hours
Sequence
Gly-His-Lys
Indications
What the research community uses this compound for, with self-reported effectiveness.
Skin Regeneration
Collagen Synthesis
Most effectiveIncreases type I and III collagen production by up to 70% in human dermal fibroblasts.
Elastin Production
Most effectiveStimulates elastin synthesis for improved skin elasticity and resilience.
Skin Barrier Function
EffectiveStrengthens protective barrier and improves moisture retention.
Hair Growth
Follicle Stimulation
EffectivePromotes hair follicle enlargement and extends anagen (growth) phase.
Scalp Health
EffectiveImproves scalp circulation and reduces inflammation.
Anti-Inflammatory
Immune Modulation
ModerateRegulates inflammatory cytokine production.
Tissue Protection
ModerateProtects tissues from oxidative stress and damage.
Dosing protocols
Common protocols by delivery method. Adjust the curve below to model accumulation in your own cycle.
Topical
Most common delivery method for skin and hair applications. Available as creams, serums, and solutions.
| Protocol | Dose | Frequency | Route / duration |
|---|---|---|---|
| Anti-aging skincare | 0.5-1% cream | 1-2x daily | Topical application |
| Hair growth stimulation | 1-2% solution | 1x daily | Scalp massage |
| Wound healing | 1-2% gel | 2-3x daily | Direct application |
| General skin health | 0.5% serum | 1x daily | Face and neck |
| Intensive repair | 2% cream | 1x daily | Targeted areas |
Preparation
Steps
- Cleanse skin thoroughly with gentle cleanser
- Pat skin dry and wait 5 minutes
- Apply thin, even layer to target areas
- Massage gently until fully absorbed (1-2 minutes)
- Follow with moisturizer if using serum
- Always apply sunscreen during daytime use
Work out the water volume and syringe units in the reconstitution calculator →
Injectable
Injectable form provides systemic effects but is not FDA-approved. Requires refrigeration after reconstitution.
| Protocol | Dose | Frequency | Route / duration |
|---|---|---|---|
| Systemic anti-aging | 1-2mg | 1x daily | SubQ |
| Enhanced regeneration | 2-3mg | 1-2x daily | SubQ |
Preparation
You will need
- GHK-Cu lyophilized powder vial
- Bacteriostatic water (BAC water)
- Insulin syringes (29-31 gauge)
- Alcohol swabs
- Sterile work surface
Steps
- Allow vial to reach room temperature (15-20 minutes)
- Clean vial tops with alcohol swabs
- Draw calculated BAC water into syringe
- Inject slowly down vial side
- Gently swirl until fully dissolved (light blue color is normal)
- Store reconstituted solution at 2-8°C, use within 30 days
Work out the water volume and syringe units in the reconstitution calculator →
Interactions
Pairwise interactions with other compounds you might be cycling — the same data behind the cycle builder's safety check.
Copper Supplements
AvoidRisk of copper toxicity; do not combine with oral copper supplements.
Melanotan II
MonitorBoth affect melanin production; use caution when combining.
Iron Chelators
MonitorMay affect copper absorption and activity.
BPC-157
SynergisticComplementary tissue healing and regeneration pathways.
TB-500
SynergisticEnhanced wound healing and tissue repair when combined.
CJC-1295
CompatibleNo known interactions.
Timeline
Typical week-by-week effects reported in clinical and observational data.
- Week 1-2
Improved skin texture and hydration
- Week 3-4
Reduction in fine lines and increased skin smoothness
- Week 6-8
Enhanced skin firmness and elasticity
- Week 8-12
Visible improvement in skin tone and clarity
- Hair Growth
6-12 weeks for initial results
Safety
Reported adverse effects, contraindications, and what to monitor on cycle.
Common side effects
- Mild skin irritation initially (usually resolves)
- Increased photosensitivity
Stop signs — stop and seek advice
- 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
Contraindications
- Known copper sensitivity or Wilson's disease
- Active skin infections at application site
- Pregnancy or breastfeeding (injectable)
Monitoring
- Patch test before first use
- Avoid contact with eyes and mucous membranes
Quality checks
What a legitimate product looks like, what should give pause, and what should make you stop.
Good signs
- Light blue tint from copper content
- Smooth texture, non-gritty
- Stable formulation without separation or crystallization
- Professional packaging with UV protection
Warning signs
- Slight color variation acceptable within blue spectrum
Stop signs — don't use
- Green or dark discoloration (oxidation/contamination)
- Grainy texture (poor formulation or crystallization)
- Separation or settling of components
Recent research
Newer papers and trial readouts on file for this compound, with source and date.
July 2025 · Frontiers in Pharmacology
Exploring the beneficial effects of GHK-Cu on an experimental model of colitis and the underlying mechanisms
GHK-Cu demonstrated significant therapeutic effects in an experimental colitis model, expanding its known applications beyond skin to gastrointestinal inflammation.
April 2024 · BioImpacts
Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospective
Review confirming GHK-Cu's cellular anti-wrinkle efficacy while highlighting delivery challenges and new permeation enhancement strategies including nanocarriers and microneedles.
References
Primary literature and clinical-trial data informing this entry.
Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data
Pickart, 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.
GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration
Pickart, 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.
The human tripeptide GHK-Cu in prevention of oxidative stress and degenerative conditions of aging: implications for cognitive health
Pickart, 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.
Tripeptides GHK and GHK-Cu-modified silver nanoparticles for enhanced antibacterial and wound healing activities
Islam, 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.
Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospective
Mortazavi, 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.
Last updated . How this page was sourced is described in the methodology.
Featured in these stacks
- Joint & Tendon RebuildA connective-tissue stack pairing BPC-157 and TB-500 with GHK-Cu for collagen-focused joint and tendon repair.3 compounds
- Skin & Hair Glow (GHK-Cu)A copper-peptide skin-and-hair stack — GHK-Cu as the workhorse with AHK-Cu as a hair-focused topical add-on.2 compounds
- Wound Healing TrioA three-peptide topical-and-systemic wound stack — antimicrobial LL-37 plus the BPC-157/GHK-Cu repair pair.3 compounds