Copper peptide GHK-Cu — injectable and topical dosing, reconstitution, stacking with BPC-157, cycling and safety. For research purposes only — not for human use.
Clean Peptides does not provide advice on dosages or usage. This guide compiles product information from Clean Peptides together with independent educational material from PeptideWiki, for research reference only. It is not medical advice and does not represent recommendations, endorsements, or instructions from Clean Peptides.
What Is GHK-Cu?
GHK-Cu (glycyl-L-histidyl-L-lysine:copper(II)) is a naturally occurring tripeptide with high affinity for copper(II) ions, first isolated from human plasma by Dr. Loren Pickart in 1973. It has over 60 published studies across wound healing, collagen synthesis, anti-aging and tissue remodeling. Uniquely, it has established protocols for both injectable (systemic healing) and topical (localized skin rejuvenation) use.
Injectable dosing derives from animal studies, plasma-concentration research and community protocols; topical is supported by human skin studies.
Key Characteristics
- Naturally occurring — declines with age (200 ng/mL in youth → 80 ng/mL by age 60).
- Copper delivery — essential cofactor for repair enzymes (SOD, lysyl oxidase).
- Collagen synthesis — stimulates collagen I and III, decorin, elastin, glycosaminoglycans.
- Wound healing — accelerates closure, attracts immune cells, promotes angiogenesis.
- Anti-inflammatory — reduces TNF-alpha and IL-6.
- Gene modulation — affects expression of >4,000 genes toward a healthier profile.
- Dual routes — effective both systemically (injectable) and locally (topical).
How Dosage Is Determined
Informed by decades of research: topical 1–2% studies in humans, injectable studies in animals/cell cultures, and plasma-concentration data. Injectable 1–2 mg/day SubQ emerged from practitioner and community experience. Strength of evidence: strong for topical, moderate for injectable.
Injectable Dosage Ranges
| Level | Dose/Injection | Frequency | Daily Total |
|---|---|---|---|
| Conservative | 0.5 mg | Once daily | 0.5 mg/day |
| Standard | 1.0 mg | Once daily | 1.0 mg/day |
| Aggressive | 2.0 mg | Once daily | 2.0 mg/day |
Most start at 1.0 mg once daily. The 2.0 mg dose is reserved for acute wound healing/post-surgical protocols. Higher doses do not produce proportionally better results.
Topical Protocols
| Formulation | Concentration | Frequency | Application Area |
|---|---|---|---|
| Serum | 1–2% GHK-Cu | 1–2x daily | Face, neck, target areas |
| Cream | 0.5–1% GHK-Cu | 1–2x daily | Face, body, wound sites |
| Custom (compounded) | 1–3% GHK-Cu | 1–2x daily | Per provider instructions |
Apply to clean skin before heavier creams. Consistency for 4–8 weeks before assessing. No cycling needed. Avoid layering with strong acids or L-ascorbic acid (vitamin C), which destabilize the copper peptide. Patch test first.
Reconstitution & Dosing (with the supplied 3 mL)
Every Clean Peptides vial ships with 3 mL of bacteriostatic water (0.9% benzyl alcohol). All figures below assume you reconstitute with the full 3 mL. On a standard U-100 insulin syringe, 100 units = 1 mL.
Quick formula: concentration = vial strength ÷ 3 mL, and units to draw = dose (mg) × 300 ÷ vial strength (mg).
How to reconstitute
- Wash your hands and lay out the vial, the 3 mL bacteriostatic water, an insulin syringe and alcohol swabs on a clean surface.
- Flip off the caps and swab both rubber stoppers with alcohol; let them air-dry 10–15 seconds.
- Draw the full 3 mL of bacteriostatic water (in three 1 mL passes with an insulin syringe, or in one pass with a 3 mL syringe).
- Add the water slowly, angling the needle so it runs down the inside glass wall — never squirt it directly onto the powder cake.
- Dissolve gently — let the vial sit 1–2 minutes, then swirl or roll it between your palms until the solution is clear. Expect a blue/blue-green tint — this is normal for copper peptides and confirms the copper is bound. Never shake.
- Label and refrigerate at 2–8 °C. Resulting concentration: 50 mg → 16.67 mg/mL; 100 mg → 33.33 mg/mL.
Storage: unreconstituted powder refrigerated (2–8 °C); reconstituted solution refrigerated and used within 28–30 days; do not freeze; protect from light and heat.
Draw volumes with 3 mL — GHK-Cu
| Vial (Clean Peptides) | Concentration | 0.5 mg | 1 mg | 2 mg |
|---|---|---|---|---|
| 50 mg | 16.67 mg/mL | 3 u | 6 u | 12 u |
| 100 mg | 33.33 mg/mL | 1.5 u | 3 u | 6 u |
Dosage by Goal
- Skin rejuvenation & anti-aging: injectable 1.0 mg/day × 4–8 wk + topical 1–2% serum 2x daily ongoing.
- Wound healing & post-surgical: injectable 1–2 mg/day × 2–4 wk; topical once granulation begins. Often stacked with BPC-157.
- Hair growth: topical 1–2% to scalp daily + injectable 1.0 mg/day × 8–12 wk.
- Systemic anti-inflammatory & tissue repair: injectable 1–2 mg/day × 4–8 wk; often with BPC-157.
For cosmetic skin goals, topical has the strongest human evidence; injectable is preferred for systemic/post-surgical goals.
Injection Guide
- Wash hands & prepare.
- Swab the stopper; air-dry.
- Draw the dose (slight blue/green tint is normal); tap out bubbles.
- Select site — abdomen (2–3 in from navel) or front of thigh; rotate daily.
- Clean the site; air-dry.
- Inject into a pinched fold at 45°.
- Dispose in a sharps container.
Cycle Duration & Timing
| Protocol | Duration | Best For |
|---|---|---|
| Standard injectable cycle | 4–8 wk on, 4 wk off | Skin rejuvenation, general healing, anti-inflam. |
| Extended injectable cycle | 8–12 wk on, 4 wk off | Hair growth, chronic wound healing |
| Topical (ongoing) | Continuous — no cycling | Daily skincare, cosmetic maintenance |
Injectable at any consistent time (morning common). Topical serum best applied twice daily.
Stacking Protocols
GHK-Cu + BPC-157 — comprehensive healing stack:
| Compound | Dose | Frequency | Purpose |
|---|---|---|---|
| GHK-Cu | 1–2 mg SubQ | Once daily | Collagen synthesis, tissue remodeling |
| BPC-157 | 250–500 mcg SubQ | Once/twice daily | Angiogenesis, growth factor, local repair |
Full BPC-157 protocols: see our BPC-157 Dosage Guide.
GHK-Cu + Thymosin Alpha-1 — immune + repair stack: GHK-Cu 1 mg SubQ daily + Thymosin Alpha-1 1.6 mg SubQ 2–3x/week.
Safety, Side Effects & Contraindications
Favorable safety profile across decades; topical widely used in OTC cosmetics.
Injectable side effects (mild, transient): injection-site irritation/redness, occasional headache, rare nausea. Topical: occasional mild irritation; rare contact sensitivity.
Contraindications: active cancer or history of cancer; Wilson’s disease or copper-metabolism disorders; pregnancy and breastfeeding; copper allergy.
Regulatory: injectable not FDA-approved (research peptide); topical regulated as a cosmetic ingredient; not currently prohibited by WADA (verify).
Common Mistakes
- Using topical-grade GHK-Cu for injection (only sterile injectable-grade for SubQ).
- Expecting overnight topical results (4–8 weeks needed).
- Applying topical to open wounds too early.
- Discarding the vial because it looks blue/green (that is normal).
- Running injectable doses beyond 2 mg/day.
- Not cycling injectable use.
- Layering with incompatible actives (AHAs/BHAs, vitamin C).
Key Takeaways
- Dual-route peptide: injectable 1–2 mg/day SubQ and topical 1–2% serum.
- Naturally declines with age; stimulates collagen I/III, elastin and glycosaminoglycans.
- Blue/green reconstituted color is normal (copper II).
- Injectable cycle 4–8 wk on / 4 wk off; topical continuous.
- Top stack GHK-Cu + BPC-157; contraindicated in copper disorders, active cancer, pregnancy.
Download & Related Resources
Shop GHK-Cu: GHK-Cu 100 mg · GHK-Cu 50 mg
Related guides: BPC-157 Dosage Guide · KLOW Pen 80 mg Dosing Guide
References
- Pickart L. “The human tri-peptide GHK and tissue remodeling.” J Biomater Sci Polym Ed. 2008;19(8):969-988.
- Pickart L, Margolina A. “Regenerative and protective actions of the GHK-Cu peptide.” Int J Mol Sci. 2018;19(7):1987.
- Maquart FX, et al. “Stimulation of collagen synthesis by GHK-Cu²⁺.” FEBS Lett. 1988;238(2):343-346.
- Leyden J, et al. “Facial skin rejuvenation by copper peptide cream.” J Cosmet Dermatol. 2002;1(Suppl 1):S17.
- Pollard JD, et al. “Synthetic GHK-Cu promotes healing of segmental bone defects.” J Bone Joint Surg Am. 2005;87(Suppl 2):57-63.
For research purposes only — not for human use. Educational reference compiled from PeptideWiki (peptidewiki.co).
