Quick math example
A 50 mg vial mixed with 5 mL gives 10 mg/mL. A 2 mg dose is 0.2 mL, which equals 20 units on a U-100 syringe.
GHK-Cu 50 mg vial reference
U100 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) |
Educational reference only — not a dose recommendation. Units assume a U100 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 — more water simply spreads the same 50 mg across a larger liquid volume, lowering the concentration and raising the syringe units for any given dose. Most people pick a volume that keeps a typical 1–2 mg dose on an easy-to-read part of a U-100 syringe.
5 mL is a popular choice for a 50 mg vial because it gives a round 10 mg/mL, so a 2 mg dose lands on exactly 20 units. If you prefer a smaller injection volume, use less water and accept smaller, harder-to-read marks.
- 50 mg / 2 mL = 25 mg/mL → 2 mg = 0.08 mL = 8 units
- 50 mg / 3 mL = 16.7 mg/mL → 2 mg = 0.12 mL = 12 units
- 50 mg / 5 mL = 10 mg/mL → 2 mg = 0.20 mL = 20 units
50 mg GHK-Cu doses per vial
At a 2 mg dose, a 50 mg vial holds about 25 doses on paper; at 1 mg, roughly 50. Real-world yield is a little lower because each draw leaves about 0.05 mL of product in the syringe dead space, which adds up over dozens of injections.
Because GHK-Cu vials are large relative to the per-dose amount, the reconstituted vial will usually be in use for weeks. Keep it refrigerated and protected from light, and confirm your supplier's beyond-use guidance rather than the calculator's math alone.
- 50 mg at 2 mg/dose ≈ 25 doses (before dead-space loss)
- 50 mg at 1 mg/dose ≈ 50 doses
- Larger vial = longer in-use life = store carefully at 2–8°C
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 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 100 mg vial with 5 mL example
A larger 100 mg vial mixed with 5 mL gives 20 mg/mL, or 20,000 mcg/mL — double the strength of the 50 mg example.
At this concentration a 2 mg dose is only 0.1 mL (10 units). A stronger vial keeps draws small even for larger doses.
- 100 mg / 5 mL = 20 mg/mL
- 2,000 mcg / 20,000 mcg per mL = 0.1 mL = 10 U-100 units
- A stronger vial keeps the same dose at a smaller volume
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.