GHK-Cu 200 mg reconstituted with 3 mL
Concentration
66.67mg/mL
- Per insulin unit
- 666.7 mcg
- Solution in vial
- 300 u
- 2 mg draw
- 3 u
Math utility only — not medical advice. Not a recommended dose.
Units per dose at 66.67 mg/mL
Insulin syringes are graduated in hundredths of a millilitre, so units = mL × 100 on a U-100, U-50 or U-30 barrel alike.
| Dose | Volume | U-100 units | Fits | Doses per vial |
|---|---|---|---|---|
| 1 mg | 0.015 mL | 1.5 u | U-30 | 200 |
| 2 mg | 0.03 mL | 3 u | U-30 | 100 |
How this is calculated
1 · Concentration
200 mg ÷ 3 mL = 66.67 mg/mL
The peptide mass never changes — bacteriostatic water only sets how concentrated the solution is, and therefore how far the plunger travels.
2 · Volume for a 2 mg dose
2 mg ÷ 66.67 mg/mL = 0.03 mL
3 · Insulin units
0.03 mL × 100 = 3 units
Every unit on the barrel carries 666.7 mcg at this concentration, so misreading by one unit is a 666.7 mcg error.
See it on a real syringe
The interactive calculator draws this 66.67 mg/mL mix on a scaled U-100 barrel, shows when a draw lands exactly on a printed tick, and works backwards from a target dose to the water volume that makes it land cleanly.
Open the interactive calculator →Common questions
- How much bacteriostatic water for a 200 mg GHK-Cu vial?
- Adding 3 mL of bacteriostatic water to a 200 mg GHK-Cu vial yields 66.67 mg/mL — 666.7 mcg in every insulin unit. The reconstituted vial holds 300 units of solution in total.
- How many units is a 2 mg dose of GHK-Cu at 200 mg in 3 mL?
- 2 mg is 0.03 mL of this mix, which is 3 units on a U-100 insulin syringe (a U-30 barrel is enough).
- How many 2 mg doses does a 200 mg vial give?
- A 200 mg vial contains 100 full 2 mg doses. Using more or less bacteriostatic water changes the units you draw, never the number of doses in the vial.