GHK-Cu Reconstitution Calculator
BAC water, concentration & dose-to-units charts
Work out how much bacteriostatic water to add to a GHK-Cu (copper peptide) vial and what each dose becomes in syringe units — for example, a 100 mg vial in 2 mL is 50 mg/mL, so a 2 mg dose is 0.04 mL, or 4 units on a U-100 syringe. GHK-Cu is a research peptide and is not FDA approved for injection; this page handles reconstitution math only.
How GHK-Cu reconstitution works
GHK-Cu is supplied as a freeze-dried (lyophilized) powder that you dissolve with bacteriostatic water before measuring a dose. Because GHK-Cu vials are large (often 50–100 mg), the resulting concentration is high — a 100 mg vial in 2 mL is 50 mg/mL.
At a high concentration each milligram is a very small volume, so dose volume is the dose divided by the concentration, and on a U-100 insulin syringe that volume × 100 gives the unit marks. Adding more water lowers the concentration and makes each dose a larger, easier-to-read draw.
Reconstitution chart: concentration by GHK-Cu vial size and water added
| Vial size | +1 mL | +2 mL | +3 mL | +5 mL |
|---|---|---|---|---|
| 50 mg | 50 mg/mL | 25 mg/mL | 16.7 mg/mL | 10 mg/mLBest |
| 100 mg | 100 mg/mL | 50 mg/mL | 33.3 mg/mL | 20 mg/mL |
GHK-Cu dose to syringe units (by concentration)
| Dose | 10 mg/mL | 20 mg/mL | 50 mg/mL |
|---|---|---|---|
| 1 mg | 0.1 mL → 10 | 0.05 mL → 5 | 0.02 mL → 2Best |
| 2 mg | 0.2 mL → 20 | 0.1 mL → 10 | 0.04 mL → 4 |
| 5 mg | 0.5 mL → 50 | 0.25 mL → 25 | 0.1 mL → 10 |
How to reconstitute a GHK-Cu vial
Storage & safety
Bacteriostatic water contains benzyl alcohol as a preservative, so a reconstituted vial can be used for multiple draws; keep it refrigerated and protected from light, and labeled with its concentration and date. GHK-Cu solutions are a characteristic blue from the copper.
This page is educational and only handles reconstitution and unit math. Injectable GHK-Cu is not an approved medication, so decisions about whether to use it belong with a qualified healthcare professional, and you should verify any vial’s real content before relying on the label.
Frequently Asked Questions
100 mg in 1 mL is 100 mg/mL; in 2 mL is 50 mg/mL; in 5 mL is 20 mg/mL. Because the vial is large and doses are small, more water (a lower concentration) makes each dose easier to measure. Use the chart above.
At 50 mg/mL, 2 mg is 0.04 mL, or 4 units on a U-100 insulin syringe. At 20 mg/mL it is 0.1 mL (10 units). Units = (dose ÷ concentration) × 100.
No. Topical GHK-Cu cosmetics are a separate, non-injectable product. This calculator is for reconstituting lyophilized GHK-Cu vials, which is a research-peptide use.
The blue color comes from the copper in the peptide complex and is normal. A uniform clear-blue solution after gentle swirling is expected.
Yes. Shotlee stores your vial concentration, logs each dose, and sends reminders so you do not have to recompute. It is free.
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