PRTCL.Sign in
Basics & Technique

How do I reconstitute a 10 mg GHK-Cu vial?

Updated 2026-05-05

Add 1 mL of bacteriostatic water to a 10 mg GHK-Cu vial. That gives you 10 mg per mL. On a U-100 insulin syringe, 10 units equals 1 mg of GHK-Cu, 5 units equals 500 mcg, and 2 units equals 200 mcg. The mixed liquid will look slightly blue - that is normal and means the copper is active. Swirl gently, do not shake, and refrigerate.

IfIf your dose is 1 mg
Thenthen draw 10 units on a U-100 insulin syringe
IfIf your dose is 200-500 mcg
Thenthen draw 2-5 units on a U-100 insulin syringe (a 30-unit syringe is easier to read at this small volume)
IfIf the liquid is clear (no blue tint)
Thenthen the copper may be off - reach out to your source before injecting
IfIf you also want to use it on your face
Thenthen this concentration is too strong topically - look for a 0.05-0.1% serum instead
Key facts
  • 10 mg vial + 1.0 mL bac water = 10 mg/mL concentration
  • Common subcutaneous dose is 1-2 mg once daily, 5 days per week
  • A faint blue tint is the visual signature of the copper-bound peptide
  • Mixed solution stays stable in the fridge for ~30 days; do not freeze
  • Larger 50 mg or 100 mg vials are more common in compounded supply - the math works the same
Get more like this

Your guided peptide companion.

PRTCL walks beginners through their first peptide with confidence - guided reconstitution, dose calculation, vial tracking, and answers to questions like this one. Built for first-timers, useful for everyone.

  • · Guided walkthrough for your first dose
  • · Dose calculator that does the math for you
  • · Vial inventory and dose log tracking
  • · Library of physician-vetted protocols

Free to start. Sign in if you already have an account.

PRTCL is educational. Always talk to a licensed provider about your situation.