GHK-Cu reconstitution calculator
Opens on a 100 mg vial, 2 mL of bacteriostatic water and a 5 mg dose, amounts recorded for GHK-Cu in the compound library. Change any field and the draw updates.
Also known as Copper Peptide.
Original calculator
The classic all-in-one form
Every input on one card, the way the original site worked.
Typical vial strength and dose filled in; recorded examples appear as one-tap presets.
- Draw 10 units for 5 mg doses of GHK-Cu.
- Concentration 50 mg/mL (100 mg in 2 mL). Each vial holds 20 doses of 0.1 mL.
For research and educational use. This calculator does not provide medical advice.
How the numbers work for GHK-Cu
A 100 mg vial of GHK-Cu with 2 mL of bacteriostatic water is 100 / 2 = 50 mg/mL. A 5 mg dose is 5 / 50 = 0.1 mL, which is 10 units on a U-100 syringe, or the same number of clicks on a pen. With 3 mL of water instead, the concentration is 33.33 mg/mL and the same dose is 15 units. At that dose the vial holds 20 doses.
The formulas are the same for every compound: concentration is the vial amount divided by the water, the draw is the dose divided by the concentration, and a U-100 unit is 0.01 mL. They are written out on the methodology page.
GHK-Cu units at a glance
Syringe units for the amounts recorded for GHK-Cu, from a 100 mg vial, across the water volumes people most often use. These are recorded examples used for the arithmetic, not recommendations; a draw under 6 units is hard to measure repeatably and more water fixes that.
| Dose | 1 mL water100 mg/mL | 2 mL water50 mg/mL | 3 mL water33.33 mg/mL |
|---|---|---|---|
| 1 mg | 1 units0.01 mL | 2 units0.02 mL | 3 units0.03 mL |
| 5 mg | 5 units0.05 mL | 10 units0.1 mL | 15 units0.15 mL |
Where the amounts come from
The doses above are recorded amounts from the GHK-Cu entry in the compound library, which lists the sources behind them, labels each as clinical, preclinical or community-reported, and states what the evidence can and cannot support. The vial strength is the one most often listed by suppliers. Nothing on this page is medical advice.
Common questions about GHK-Cu
- Is GHK-Cu an FDA-approved medicine?
- GHK-Cu is not an approved medicine. For injection, FDA placed it in category 2 for immunogenicity concerns and the nomination was withdrawn. For non-injectable routes it sits in 503A category 1, under FDA evaluation, and FDA plans to consult its advisory committee on it before the end of February 2027. It is also a cosmetic ingredient.
- How much bacteriostatic water do I add to a 100 mg vial of GHK-Cu?
- There is no single right amount: the water sets the concentration and the size of the draw, not the dose. This page opens on 2 mL, which makes 50 mg/mL and puts a 5 mg dose at 10 units on a U-100 syringe. With 1 mL the same dose is 5 units; with 3 mL it is 15 units. More water gives a larger, easier-to-read draw, as long as the vial can hold it.
- How many units is 5 mg of GHK-Cu?
- At 50 mg/mL (100 mg in 2 mL of water), 5 mg is 0.1 mL, which is 10 units on a U-100 insulin syringe or 10 clicks on a peptide pen. At any other concentration the number changes; the units table on this page gives the other common water volumes.
- How many doses are in a 100 mg vial of GHK-Cu?
- At 5 mg per dose, a 100 mg vial holds 20 doses. The water volume changes the size of each draw, not the number of doses in the vial.
- Where do the GHK-Cu amounts on this page come from?
- They are amounts recorded for GHK-Cu in the compound library (https://peptidescalculator.com/compound-library/ghk-cu-copper-peptide), which lists the sources behind them and labels each as clinical, preclinical or community-reported. They are shown for the arithmetic, not as recommendations, and the vial strength is the one suppliers list most often. Nothing on this page is medical advice.