GHK-Cu Dosage Calculator
GHK-Cu is the blue one. It ships in unusually large vials, 50 mg or 100 mg, and the doses discussed online are whole milligrams, so the arithmetic looks different from the microgram peptides and the water volumes are larger.
This page converts a 50 mg or 100 mg GHK-Cu vial into units per dose and explains why the injectable numbers you see have no human study behind them.
Forum protocols onlyThe ranges you see online come from forums and animal-study extrapolation. No human dose-finding trial exists. · Reviewed by the FormBlends Editorial Standards Team · 2026-09-03
Forum protocols onlyNo FDA label. Human evidence is for topical use. Injectable ranges of 1 to 2 mg are forum protocols.
Enter your dose to see the units to draw, the volume in mL, and how long the vial lasts.
FDA compounding status (2026-05-14): Split by route. Non-injectable routes are in 503A Category 1 as of the 05/14/2026 list. Full status table and sources
What the GHK-Cu dose evidence actually is
No FDA label. Human evidence is for topical use. Injectable ranges of 1 to 2 mg are forum protocols.
Human research on GHK-Cu is almost entirely topical: creams and serums at 1 to 2 percent in skin studies. There is no published human trial of injectable GHK-Cu and no label. The 1 to 2 mg injectable figures, given daily or a few times a week, come from clinic protocols and forums.
That leaves the calculator with one honest job: show the arithmetic for whatever dose you were given.
GHK-Cu units at each water volume
The table uses a 50 mg vial. Each cell is the draw on a U-100 insulin syringe for that dose at that water volume. Cells above 100 units do not fit a 1 mL syringe; cells below 10 units sit in the part of a 1 mL barrel where measurement error rises, and a 0.5 mL or 0.3 mL syringe reads them better.
| Dose | 50 mg + 1 mL50 mg/mL | 50 mg + 2 mL25 mg/mL | 50 mg + 3 mL16.667 mg/mL | 50 mg + 5 mL10 mg/mL |
|---|---|---|---|---|
| 0.5 mg | 1 units | 2 units | 3 units | 5 units |
| 1 mg | 2 units | 4 units | 6 units | 10 units |
| 2 mg | 4 units | 8 units | 12 units | 20 units |
| 5 mg | 10 units | 20 units | 30 units | 50 units |
The doses in this table are round numbers chosen to show the arithmetic. They are not recommendations; no label or human dose-finding trial exists for GHK-Cu.
Mixing GHK-Cu
A 50 mg vial with 5 mL gives 10 mg per mL, so 1 mg is 10 units and 2 mg is 20 units. A 100 mg vial with 5 mL gives 20 mg per mL and halves those draws. Because the vial is large, 5 mL is common and most 10 mL research vials hold it; check that yours does.
The solution is deep blue, which makes it easy to see in the syringe but also easy to mistake for a strong concentration. Colour tells you nothing about mg per mL.
Storing GHK-Cu after mixing
Refrigerate after mixing. A 50 mg vial at 2 mg daily is 25 doses, just inside the 28-day multiple-dose ceiling. At 1 mg daily it is 50 doses and the calculator will flag the overrun.
GHK-Cu calculator questions
How much bac water for 50 mg GHK-Cu?
Five millilitres gives 10 mg per mL, which puts 1 to 2 mg doses at 10 to 20 units. Two millilitres gives 25 mg per mL and 2 mg becomes 8 units.
How many units is 2 mg of GHK-Cu?
Twenty units at 10 mg per mL (50 mg in 5 mL), 10 units at 20 mg per mL (100 mg in 5 mL), 8 units at 25 mg per mL (50 mg in 2 mL).
Is there human evidence for injecting GHK-Cu?
No published trial. The human evidence is topical. Injectable ranges are forum and clinic protocols.
Where is GHK-Cu injected?
Forum protocols describe subcutaneous injection in the abdomen or near the area of interest. That is a prescriber question; the calculator only converts the dose.
Sources
GHK-Cu guide
Evidence, mechanism, side effects and regulatory status.
GHK-Cu through FormBlends
Provider review, licensed pharmacy, labelled concentration.
The full peptide calculator
All peptides, pre-mixed vials, blends, mistakes and concentration changes.
Free downloads built from this calculator's math
Peptide Dosing and Reconstitution Chart 2026
20 pages, 12 peptides, every vial size, units at five water volumes, printable vial labels. PDF.
Bacteriostatic Water Cheat Sheet
How much to add, what one unit holds, the 28-day rule stated correctly, four mistakes to avoid. PDF.
28-Day GLP-1 Injection Tracker
Dose, units drawn, site, weight, side effects and the vial counting down. PDF and spreadsheet.
Other peptide calculators
Arithmetic only. This page converts the dose you enter into units and millilitres. It does not recommend a dose. GHK-Cu is not an FDA-approved drug and no human dose-finding trial exists; any dose you enter should come from a prescriber. FormBlends connects patients with licensed providers and pharmacies and does not prescribe or dispense.
