How to Reconstitute GHK-Cu: Step-by-Step Visual Guide

Materials Needed

Required materials: lyophilized GHK-Cu vial (commonly 50 mg or 100 mg for research applications), bacteriostatic water (30 mL vial), U-100 insulin syringes (1 mL, 29–31 gauge), alcohol prep pads, exam gloves, and a sharps container. GHK-Cu (glycyl-L-histidyl-L-lysine:copper(II)) is a naturally occurring copper-binding tripeptide found in human plasma, saliva, and urine. Research has investigated its roles in wound healing, skin remodeling, collagen synthesis, and anti-inflammatory signaling. It is not FDA-approved for injection in humans as a pharmaceutical.

Calculating BAC Water Volume

GHK-Cu research doses are typically in the 0.5–2 mg range per administration site. A practical concentration of 5 mg/mL keeps injection volumes to 0.1–0.4 mL.

Worked example — 50 mg vial targeting 5 mg/mL: 50 mg ÷ 5 mg/mL = 10 mL BAC water. At 5 mg/mL on a U-100 syringe: 0.5 mg dose = 10 units; 1 mg dose = 20 units; 2 mg dose = 40 units.

Alternative — 50 mg vial targeting 2 mg/mL: 50 mg ÷ 2 mg/mL = 25 mL BAC water. At 2 mg/mL: 1 mg dose = 50 units; 2 mg dose = 100 units (1 full syringe).

Reconstitution Steps

Step 1 — Swab both vial stoppers with alcohol prep pads. Allow 30 seconds to air-dry. GHK-Cu vials often have a faint blue-green tint on the stopper from the copper complex.

Step 2 — Draw the calculated BAC water volume into the syringe. For 10 mL, perform 10 separate 1 mL syringe fills. Alternatively, use a larger syringe if available.

Step 3 — Insert the needle into the GHK-Cu vial and slowly inject BAC water along the inner glass wall. GHK-Cu lyophilized powder is very water-soluble due to the copper chelate and dissolves nearly on contact with water.

Step 4 — Gently swirl the vial. GHK-Cu dissolves almost immediately. The solution should be uniformly blue-green and clear (no turbidity). Do not shake.

Step 5 — Inspect the solution: it should be clear and blue-green (from the copper). Turbidity, brown discoloration, or visible particles indicate a problem; discard and prepare fresh.

Calculating Units on Syringe per Dose

Using 50 mg in 10 mL (5 mg/mL):

0.5 mg dose: 0.5 mg ÷ 5 mg/mL = 0.1 mL = 10 units on U-100 syringe.

1.0 mg dose: 1.0 mg ÷ 5 mg/mL = 0.2 mL = 20 units.

2.0 mg dose: 2.0 mg ÷ 5 mg/mL = 0.4 mL = 40 units.

Storage After Reconstitution

Store reconstituted GHK-Cu at 2–8°C in the dark. The copper chelate is light-sensitive. In bacteriostatic water, the reconstituted solution is generally stable for 4–6 weeks when refrigerated and protected from light. Wrap the vial in foil if possible. Do not freeze — the copper complex can precipitate upon thawing. Label with reconstitution date and concentration. Lyophilized powder is stable at -20°C for 12–24 months.

Safety Notes and Research Framing

GHK-Cu is a naturally occurring human peptide-copper complex first isolated from plasma by Loren Pickart in 1973. Preclinical research has investigated topical and systemic applications for wound healing, skin regeneration, nerve regeneration, and anti-inflammatory effects. GHK-Cu is used in cosmetic formulations topically (this is distinct from injectable research use). Injectable research applications are preclinical only. This guide is for research reference. No information herein constitutes medical advice.