GHK-Cu Reconstitution & Dose Calculator
GHK-Cu is a copper-binding tripeptide studied for skin, collagen, and hair-follicle support. It ships in much larger vials than most peptides, commonly 50, 100, or 200 mg. This free calculator turns a GHK-Cu vial plus bacteriostatic water into the exact insulin syringe units to draw. It is unit-conversion math, not a dosing recommendation. GHK-Cu vials are commonly 50 mg, 100 mg, 200 mg, so the tool below starts at 50 mg; change any field to match your own vial.
Reconstitution calculator
Pick your peptide, vial size, and BAC water. Get exact units to draw on a 1 mL insulin syringe.
Pick your peptide
Type to search, or pick from the dropdown. Auto-fills the recommended vial size.
- • Standard insulin syringe = 100 units total
- • Small markings = 1 unit each
- • Large markings = 10 units (0.1 mL)
- • 100 units = 1 mL
Always verify reconstitution math against a second source before any dose you actually inject.
GHK-Cu concentration at a glance
Concentration is just vial mg divided by the bacteriostatic water you add. A more dilute mix gives a bigger, easier-to-read draw on the syringe. Here is a 50 mg GHK-Cu vial at three common water volumes (U-100 insulin syringe, where 1 unit = 0.01 mL):
| BAC water | Concentration | Per insulin unit | 50 units draws |
|---|---|---|---|
| 1 mL | 50 mg/mL | 500 mcg | 25 mg |
| 2 mL | 25 mg/mL | 250 mcg | 12.50 mg |
| 3 mL | 16.67 mg/mL | 166.67 mcg | 8.33 mg |
Worked example: a 50 mg GHK-Cu vial in 2 mL of bacteriostatic water is 25 mg/mL. One unit on a U-100 pin is 250 mcg, so if your protocol calls for 12.50 mg you would draw to 50 units. That is arithmetic from the numbers you enter, nothing more. Pepdex does not tell you what dose to take.
GHK-Cu reconstitution questions
- How do you reconstitute GHK-Cu?
- Add bacteriostatic water to the dry GHK-Cu vial slowly down the side, let it dissolve without shaking, and store it in the fridge. The amount of water you add sets the concentration. A 50 mg vial in 2 mL of water is 25 mg/mL; the same vial in 1 mL is 50 mg/mL. Use the calculator above with your own vial and water to see the exact result.
- How many insulin units is a dose of GHK-Cu?
- It depends entirely on how much water you mixed, because milligrams describe the powder and units describe the volume drawn. With a 50 mg vial reconstituted in 2 mL, one unit on a U-100 pin is 250 mcg, so 50 units draws 12.50 mg. Change the water and that number changes. Enter your numbers above to get yours.
- What vial sizes does GHK-Cu come in?
- Commonly 50 mg, 100 mg, 200 mg. The calculator defaults to 50 mg for GHK-Cu but you can set any vial size. Always work from the mg printed on the vial you actually have, not a number from a forum.
- Why is the GHK-Cu vial so much bigger than other peptides?
- GHK-Cu is measured in milligrams, not the micrograms typical of other peptides, so its vials are 50 mg and up rather than 5 to 10 mg. That makes the reconstitution numbers run much larger. Enter your vial size and water amount above to see the exact concentration.
- Is the GHK-Cu calculator free?
- Yes. The reconstitution and units math is completely free with no account. A free account adds saving your protocol plus a 3-day trial of the AI Coach and Personal Stack.
Educational reference only. Pepdex does not sell peptides, recommend vendors, or tell you what dose to take. GHK-Cu reconstitution math here is unit conversion you can verify by hand. Talk to a qualified provider about your own use.