Use this GHK-Cu dosage calculator for a 100 mg or 50 mg vial: it turns vial strength, BAC water volume, and target dose into a precise draw in mL and syringe units. GHK-Cu is also formulated for topical use, but this page focuses on the math for liquid reconstitution.
- Common vial examples
- 50 / 100 mg
- Example dose
- 2 mg
- Common syringe
- U-100 insulin
- Last reviewed
Storage before and after reconstitution: Lyophilised 2–8°C; reconstituted vial refrigerated and protected from light.
Quick answers: GHK-Cu doses in units
With a 100 mg vial mixed with 5 mL of bacteriostatic water (20 mg/mL), on a U-100 insulin syringe:
- How many units is 1 mg of GHK-Cu?
- 5 units (0.05 mL)
- How many units is 2 mg of GHK-Cu?
- 10 units (0.1 mL)
Educational maths only, not a dose recommendation. Use the calculator above for your own vial, water volume and syringe.
Quick math example
A 100 mg vial mixed with 5 mL gives 20 mg/mL. A 2 mg dose is 0.1 mL, which equals 10 units on a U-100 syringe. The same 2 mg from a 50 mg vial in 5 mL (10 mg/mL) is 0.2 mL, or 20 units.
GHK-Cu reconstitution reference
U-100 units to draw for each common GHK-Cu dose, by vial size, reconstituted with 5 mL of bacteriostatic water. Change the water volume in the calculator above to recompute for your own setup.
| Vial | Concentration | 1 mg | 2 mg |
|---|---|---|---|
| 50 mg | 10 mg/mL | 10 u(0.1 mL) | 20 u(0.2 mL) |
| 100 mg | 20 mg/mL | 5 u(0.05 mL) | 10 u(0.1 mL) |
Swipe the table to see every dose →
Educational reference only — not a dose recommendation. Units assume a U-100 insulin syringe (100 units = 1 mL on U-100). Always confirm against your own vial, diluent, and clinician or pharmacy instructions.
GHK-Cu dosage chart: units for 50 mg and 100 mg vials
Injectable GHK-Cu doses are discussed in milligrams. The amounts most often cited in community protocols are 1 to 2 mg a day, usually run in cycles of a few weeks, with some starting lower at around 0.5 mg. GHK-Cu is not an approved injectable medicine and those figures are not from a label, so this page does not recommend one. The chart converts each commonly cited amount into U-100 units for the usual 50 mg and 100 mg vial set-ups.
A 100 mg vial in 5 mL is twice as strong as a 50 mg vial in 5 mL, so every dose is half the units. Adding 10 mL to a 100 mg vial brings it back to the same 10 mg/mL as the 50 mg vial — the same units per dose, but twice as many doses.
- 50 mg + 5 mL (10 mg/mL): 1 mg = 10 units · 2 mg = 20 units
- 100 mg + 5 mL (20 mg/mL): 1 mg = 5 units · 2 mg = 10 units
- A 100 mg vial holds fifty 2 mg doses or a hundred 1 mg doses
GHK-Cu dosage chart in U-100 units
| Dose | 50 mg + 5 mL10 mg/mL | 100 mg + 5 mL20 mg/mL | 100 mg + 10 mL10 mg/mL |
|---|---|---|---|
| 500 mcg | 5 u(0.05 mL)100 per vial | 2.5 u(0.03 mL)200 per vial | 5 u(0.05 mL)200 per vial |
| 1 mg | 10 u(0.1 mL)50 per vial | 5 u(0.05 mL)100 per vial | 10 u(0.1 mL)100 per vial |
| 1.5 mg | 15 u(0.15 mL)33 per vial | 7.5 u(0.08 mL)66 per vial | 15 u(0.15 mL)66 per vial |
| 2 mg | 20 u(0.2 mL)25 per vial | 10 u(0.1 mL)50 per vial | 20 u(0.2 mL)50 per vial |
Swipe the table to see every vial →
Educational reference only — not a dose recommendation. Units assume a U-100 insulin syringe (100 units = 1 mL on U-100); “per vial” is how many of that dose the vial holds, before the small dead-space loss on each draw. Confirm against your own vial label, diluent, and clinician or pharmacy instructions.
See also: GLOW peptide dosage chart (GHK-Cu + BPC-157 + TB-500)
How the GHK-Cu calculation works
GHK-Cu is labelled in milligrams per vial. Concentration is the total mg divided by BAC water volume, and per-dose volume is your target divided by that concentration.
Larger vials are common for GHK-Cu because of its broader use in cosmetic and topical formulations; the calculator math handles the higher mg amounts the same way.
- 50 mg vial = 50,000 mcg total
- 50,000 mcg / 5 mL = 10,000 mcg per mL
- 2,000 mcg target = 0.2 mL draw
GHK-Cu 100 mg vial with 5 mL example
A 100 mg vial mixed with 5 mL gives 20 mg/mL, or 20,000 mcg/mL — double the strength of the 50 mg example below.
At this concentration a 2 mg dose is only 0.1 mL (10 units) and a 1 mg dose is 0.05 mL (5 units). A stronger vial keeps draws small even for larger doses; if 5-unit draws feel too tight to read, use 10 mL of water instead (10 mg/mL) so the same 1 mg dose becomes 10 units.
- 100 mg / 5 mL = 20 mg/mL
- 2,000 mcg / 20,000 mcg per mL = 0.1 mL = 10 U-100 units
- 100 mg / 10 mL = 10 mg/mL → 2 mg = 0.2 mL = 20 units
GHK-Cu 100 mg vial: units per dose (5 mL BAC water)
U-100 units to draw for each common GHK-Cu dose, by vial size, reconstituted with 5 mL of bacteriostatic water. Change the water volume in the calculator above to recompute for your own setup.
| Vial | Concentration | 1 mg | 2 mg |
|---|---|---|---|
| 100 mg | 20 mg/mL | 5 u(0.05 mL) | 10 u(0.1 mL) |
Swipe the table to see every dose →
Educational reference only — not a dose recommendation. Units assume a U-100 insulin syringe (100 units = 1 mL on U-100). Always confirm against your own vial, diluent, and clinician or pharmacy instructions.
GHK-Cu 50 mg vial with 5 mL example
A 50 mg GHK-Cu vial mixed with 5 mL gives 10 mg/mL, or 10,000 mcg/mL.
A 2 mg (2,000 mcg) dose is 0.2 mL, which equals 20 units on a U-100 syringe. A 1 mg dose would be 0.1 mL (10 units).
- 50 mg / 5 mL = 10 mg/mL
- 2,000 mcg / 10,000 mcg per mL = 0.2 mL = 20 U-100 units
- 1,000 mcg / 10,000 mcg per mL = 0.1 mL = 10 U-100 units
GHK-Cu 50 mg vial: units per dose (5 mL BAC water)
U-100 units to draw for each common GHK-Cu dose, by vial size, reconstituted with 5 mL of bacteriostatic water. Change the water volume in the calculator above to recompute for your own setup.
| Vial | Concentration | 1 mg | 2 mg |
|---|---|---|---|
| 50 mg | 10 mg/mL | 10 u(0.1 mL) | 20 u(0.2 mL) |
Swipe the table to see every dose →
Educational reference only — not a dose recommendation. Units assume a U-100 insulin syringe (100 units = 1 mL on U-100). Always confirm against your own vial, diluent, and clinician or pharmacy instructions.
How much BAC water for a 50 mg GHK-Cu vial
There is no single correct volume; the water sets the concentration and the concentration sets how many units each dose takes. For a 50 mg vial, 5 mL (10 mg/mL) is the most common choice because it puts a 1 mg dose exactly on the 10-unit line and a 2 mg dose on 20 units.
Use 2.5 mL (20 mg/mL) if you want smaller draws, or 10 mL (5 mg/mL) if you prefer larger, easier-to-read draws and have a vial big enough to hold it. Whatever you choose, enter it in the calculator above so the units match your actual vial.
- 50 mg / 2.5 mL = 20 mg/mL → 1 mg = 5 units, 2 mg = 10 units
- 50 mg / 5 mL = 10 mg/mL → 1 mg = 10 units, 2 mg = 20 units
- 50 mg / 10 mL = 5 mg/mL → 1 mg = 20 units, 2 mg = 40 units
Topical vs injectable framing
Topical GHK-Cu products are typically pre-formulated and do not require this math. The calculator is intended for situations where you are reconstituting a lyophilized vial yourself, and it reports mg/mL concentration rather than the percentage strength used on cosmetic labels.
Frequently asked questions
What does a GHK-Cu dosage chart look like in units?
Is GHK-Cu approved as a medicine?
How do I handle a 100 mg GHK-Cu vial?
Can the calculator tell me how to use GHK-Cu topically?
Why are GHK-Cu vials often larger than other peptides?
How many units is 2 mg of GHK-Cu from a 100 mg vial?
Primary sources
Background references for this calculator. PepSync does not make clinical claims; these citations support the educational context only.