Enter your GHK-Cu vial size and the volume of bacteriostatic water you are adding. The calculator returns the concentration in mcg/ml and the exact units to draw on a U-100 insulin syringe. GHK-Cu vials are usually large (50mg or 100mg), so accurate reconstitution matters.
Quick-fill by compound
Results
Concentration
10000 mcg/ml
10 mg/ml
Volume to inject
0.2 ml
per dose
Units on insulin syringe (U-100)
20 units
on a standard 100-unit insulin syringe
Doses per vial
25 doses
at 2000 mcg each
How this is calculated
50mg × 1,000 = 50000 mcg total
50000 ÷ 5ml = 10000 mcg/ml
2000 mcg ÷ 10000 = 0.2 ml
0.2 ml × 100 = 20 units
Disclaimer: This calculator is provided for informational purposes only. Always verify results against your specific vial labelling before use. Peptidy does not provide medical advice — consult a qualified healthcare professional before beginning or modifying any protocol. Use of research peptides may be subject to legal restrictions in your jurisdiction.
GHK-Cu is a copper-binding tripeptide researched for skin, hair, and connective-tissue applications. It is used both subcutaneously and topically. Because vials are large relative to the dose, the amount of BAC water you add has a big effect on your injection volume.
Ranges commonly reported in research use. GHK-Cu turns the solution a distinctive blue — this is the copper and is expected.
| Low daily dose | 1 mg (1,000 mcg) once daily |
| Common daily dose | 2 mg (2,000 mcg) once daily |
Worked example: 50mg vial + 5ml BAC water, 2mg dose
5ml is a common choice, giving 10,000 mcg/ml (10mg/ml). A 2mg dose is then 0.2ml = 20 units. Using more water lowers the concentration and increases the injection volume; using less does the opposite.
With a 50mg vial reconstituted in 5ml (10,000 mcg/ml): 2,000 ÷ 10,000 = 0.2ml = 20 units. With a 100mg vial in 5ml (20,000 mcg/ml): 2,000 ÷ 20,000 = 0.1ml = 10 units. Enter your own figures above for an exact result.
The blue colour comes from the copper in the peptide and is completely normal — it is one way to visually confirm you have a genuine copper-peptide solution. It does not indicate contamination.
Refrigerate at 2–8°C away from light and label the vial with the reconstitution date. Reconstituted GHK-Cu is commonly used within 4–6 weeks. Do not freeze it.
Store your vial concentration, log every dose against it, and never lose track of what you injected or when.