GHK-Cu Reconstitution: 50mg + 2mL Chart

How to Reconstitute GHK-Cu

GHK-Cu (copper peptide) arrives as a lyophilized powder and needs to be mixed with bacteriostatic water before injection. The process is identical to reconstituting any peptide, with one notable difference — GHK-Cu turns a faint blue-green color when dissolved. That's the copper ion, and it's completely normal.

This guide covers the full reconstitution process for subcutaneous injection. GHK-Cu is also used topically for skin and hair applications, but the mixing and dosing math here focuses on injectable preparation.

Research-context information only. GHK-Cu is a research peptide. Protocols, doses, and reactions reported below come from published research and self-reported community sources. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.

New to bacteriostatic water? Start with what it is, how much to use per vial, and how long it lasts — or see the full Bacteriostatic Water Guide.

What You Need

Documented protocols call for the following:

• GHK-Cu lyophilized vial (typically 50mg, 100mg, or 200mg)
• Bacteriostatic water (BAC water) — not sterile water, not saline
• Insulin syringes — 1mL (100 unit), 29-31 gauge
• Alcohol swabs — for cleaning vial tops
• A clean, flat workspace

Why bacteriostatic water? It contains 0.9% benzyl alcohol that prevents bacteria from growing in the solution. Regular sterile water has no preservative, so the vial must be used within 24 hours. BAC water allows up to 28 days refrigerated.

Step-by-Step Reconstitution

Step 1: Clean Everything

Protocols describe wiping the tops of both vials (GHK-Cu and BAC water) with alcohol swabs, then letting them air dry for 10 seconds. This prevents contamination — a step community resources flag as essential.

Step 2: Draw Your Bacteriostatic Water

Protocols describe using a fresh insulin syringe to draw the desired amount of BAC water. The amount added determines the concentration (see the dilution charts below).

Community resources commonly document 2mL as the sweet spot. It gives manageable injection volumes for standard doses.

Step 3: Add Water to the Peptide Vial

Protocols describe inserting the needle into the GHK-Cu vial at an angle, aiming at the glass wall — not directly at the powder — and letting the water trickle down the side of the vial gently.

Water is not squirted directly onto the powder. Peptides are fragile. Aggressive mixing can damage the molecular structure and reduce potency.

Step 4: Let It Dissolve

Protocols describe swirling the vial gently with a slow rotating motion rather than shaking it. The powder should dissolve within 1-3 minutes into a clear solution with a faint blue-green tint. This color is normal — it comes from the copper ion bound to the GHK peptide.

If the solution is cloudy or has visible particles after 5 minutes of gentle swirling, the peptide may be degraded. Community resources document discarding it in that case.

Step 5: Store Correctly

Reconstituted vials are refrigerated immediately at 36-46F (2-8C). The reconstituted solution is stable for up to 28 days with bacteriostatic water.

Dilution Charts

Why 2mL? It keeps injection volumes small enough for subcutaneous delivery while remaining measurable on an insulin syringe.

The Math (So You Can Do It Yourself)

Here's the formula for any vial size and any amount of water:

Concentration = Peptide Amount (mg) / Water Added (mL)

Then to find the injection volume:

Units to inject = Desired Dose (mg) / Concentration (mg/mL) x 100

Example: 100mg vial + 2mL water = 50mg/mL. For a 2mg dose: 2 / 50 x 100 = 4 units.

Don't want to do math? Use our Reconstitution Calculator — plug in the vial size, water amount, and desired dose, and it does the rest.

Affiliate disclosure: vendor links in this article are affiliate links — The Peptide Catalog may earn a commission if you buy through them, at no additional cost to you.

Common Mistakes

Shaking the Vial

Peptides are proteins. Shaking creates foam, which means air bubbles trapped against peptide molecules. This can denature (destroy) the peptide at the air-liquid interface. Protocols describe swirling gently rather than shaking. The copper complex in GHK-Cu is relatively stable, but there's no reason to stress it.

Using Too Little Water

Adding 0.5mL to a 100mg vial gives 200mg/mL. A 1mg dose would be 0.5 units — effectively impossible to measure accurately on any insulin syringe. Protocols describe using at least 1mL, ideally 2mL.

Leaving It at Room Temperature

Reconstituted GHK-Cu degrades at room temperature. Community protocols document potency degradation at room temperature; documented practice is to return the vial to refrigeration promptly after drawing a dose. The copper complex does not make it more shelf-stable once in solution.

Reusing Needles

Each puncture through the rubber stopper dulls the needle and increases contamination risk. Protocols describe a fresh syringe every time — they cost pennies.

Freezing Reconstituted Peptide

Freezing a liquid peptide solution creates ice crystals that can shear the peptide bonds apart. Protocols describe freezing only lyophilized (powder) peptides. Once reconstituted, the solution is refrigerated — never frozen.

How Many Doses Per Vial?

This depends on the dose and vial size:

50mg vial at 1mg/dose = 50 doses 50mg vial at 2mg/dose = 25 doses 100mg vial at 1mg/dose = 100 doses 100mg vial at 2mg/dose = 50 doses 200mg vial at 2mg/dose = 100 doses

Community-reported protocols using 1-2mg daily document a 50mg vial lasting 25-50 days. A 100mg vial can last months at lower doses — though the 28-day limit applies once reconstituted with BAC water. For larger vials, community protocols reconstitute only what will be used within 4 weeks.

Storage Quick Reference

Pro tip: With larger vials (100mg or 200mg), some community protocols split the reconstituted solution into smaller sterile vials to minimize stopper punctures. Another approach is purchasing multiple smaller vials and reconstituting only what will be used within 3-4 weeks.

Related Reading

• Bac Water for GHK-Cu: Topical + Injection — community-cited reconstitution ratios + 28-day storage math on bacwatercatalog
• GHK-Cu Side Effects: Injection vs Topical Routes — adverse event profile from clinical trials and community reports
• GHK-Cu Results Timeline — week-by-week timeline for skin, hair, and healing
• GHK-Cu Benefits — 6 research-backed effects ranked by evidence quality
• GHK-Cu Bloodwork Guide — what labs to track and optimal ranges
• GHK-Cu Dosing Guide — protocols, injection sites, and cycling
• BPC-157 Reconstitution Guide — another regenerative peptide, similar mixing process
• TB-500 Dosing Guide — often combined with tissue repair peptides
• Ipamorelin Reconstitution Guide — growth hormone peptide mixing guide
• CJC-1295 Reconstitution Guide — GHRH analog mixing and timing
• Calculate Your GHK-Cu Cycle Cost — estimate vials needed and total cost for your protocol
• GHK-Cu/KPV Buying Guide — skin/gut blend sourcing + ratios

References

1. Pickart, L., et al. (2012). The human tripeptide GHK-Cu in prevention of oxidative stress and degenerative conditions of aging: implications for cognitive health. Oxidative Medicine and Cellular Longevity, 2012, 324832. PMC3359723
2. Pickart, L., et al. (2015). GHK peptide as a natural modulator of multiple cellular pathways in skin regeneration. BioMed Research International, 2015, 648108. PMC4508379
3. Pickart, L., et al. (2018). Regenerative and protective actions of the GHK-Cu peptide in the light of the new gene data. International Journal of Molecular Sciences, 19(7), 1987. PMC6073405
4. Pickart, L. (2008). The human tri-peptide GHK and tissue remodeling. Journal of Biomaterials Science, Polymer Edition, 19(8), 969-988.
5. USP General Chapter 797: Pharmaceutical Compounding — Sterile Preparations. Storage and beyond-use dating guidelines for reconstituted peptides.

This guide is for educational and informational purposes only. It is not medical advice. GHK-Cu is sold as a research compound and is not FDA-approved for human use. Reconstituting and self-administering peptides carries inherent risks including infection, contamination, and dosing errors. Always use proper sterile technique. Consult a qualified healthcare provider before starting any peptide protocol. The Peptide Catalog is not responsible for any adverse effects resulting from the use or misuse of information presented here.