GHK-Cu reconstitution & dose calculator
Enter your GHK-Cu vial size, the BAC water you added and your dose to see the units to draw on a U-100 insulin syringe.
- Strength
- 16.67 mg/mL
- 1 unit holds
- 166.7 mcg
GHK-Cu reconstitution chart: units to draw by vial size and BAC water
Find the row for the mg on your vial and the water you added. Amounts are from the injectable range on our GHK-Cu page, 1 to 2 mg. Units are on a U-100 insulin syringe, where 100 units is 1 mL.
| Vial | BAC water | Strength | Units to draw for | ||
|---|---|---|---|---|---|
| 1 mg | 1.5 mg | 2 mg | |||
| 50 mg | 2 mL | 25 mg/mL | 4 | 6 | 8 |
| 3 mL | 16.67 mg/mL | 6 | 9 | 12 | |
| 5 mL | 10 mg/mL | 10 | 15 | 20 | |
| 100 mg | 2 mL | 50 mg/mL | 2 | 3 | 4 |
| 3 mL | 33.33 mg/mL | 3 | 4.5 | 6 | |
| 5 mL | 20 mg/mL | 5 | 7.5 | 10 | |
| 200 mg | 2 mL | 100 mg/mL | 1† | 1.5† | 2 |
| 3 mL | 66.67 mg/mL | 1.5† | 2.25 | 3 | |
| 5 mL | 40 mg/mL | 2.5 | 3.75 | 5 | |
* Over 100 units: more than a 1 mL syringe holds in one draw. † Under 2 units: hard to measure; more water makes the draw bigger. Arithmetic from the numbers in each row. Pepdex does not pick a dose for you.
What to know about GHK-Cu before you mix it
GHK-Cu is a copper-binding tripeptide studied for skin, collagen and hair-follicle support.
- How it is supplied
- Injectable GHK-Cu is freeze-dried powder in large vials, because it is measured in mg rather than mcg. Mixed, it turns blue. Skin serums are a separate, topical product that is never mixed.
- Common vial sizes
- 50 mg, 100 mg, 200 mg. Work from the mg printed on your own vial.
- Half-life
- Listed as about 2 hours in the bloodstream, but human data for the injectable route are very limited. Our page describes daily use.
- Usual schedule on our page
- Daily.
- FDA status
- Not FDA-approved as a drug. It is used as a cosmetic ingredient, and FDA does not pre-approve cosmetic ingredients.
- Evidence in one line
- 1 randomised trial indexed across 135 papers, and the human evidence is topical. Source: Pepdex evidence index; counts are indexed PubMed records, not deduplicated trials; PubMed query for GHK-Cu.
What people track with GHK-Cu
- Whether you used the injection, a topical serum or both, so you don't double up on copper
- Skin or hair photos every 2 to 4 weeks, in the same light
- Cycle start and stop dates (our page describes 4 to 6 week cycles)
The common GHK-Cu mix-up
Too little water for a big vial. 100 mg in 1 mL puts 1 mg in a single unit, too small to measure. A 50 mg vial in 5 mL puts 1 mg in 10 units.
Full GHK-Cu entry: evidence, side effects, FDA and WADA status
How long a GHK-Cu vial lasts
A 100 mg vial at 1 mg a shot holds 100 shots. Taken once a day, that is about 100 days (14.3 weeks). Shots per vial for each size:
| Vial | At 1 mg | At 1.5 mg | At 2 mg |
|---|---|---|---|
| 50 mg | 50 shots | 33 shots | 25 shots |
| 100 mg | 100 shots | 66 shots | 50 shots |
| 200 mg | 200 shots | 133 shots | 100 shots |
GHK-Cu reconstitution questions
- How much BAC water (reconstitution solution) do I add to a 100 mg GHK-Cu vial?
- Any amount works for the math; it only changes the strength. 100 mg in 2 mL is 50 mg/mL, in 3 mL 33.33 mg/mL, and in 5 mL 20 mg/mL. More water gives a bigger draw that is easier to read. If your product came with mixing directions, those set the volume.
- How many units is 1 mg of GHK-Cu?
- It depends on how much water is in the vial. From a 100 mg vial mixed with 3 mL, 1 mg is 3 units (0.03 mL). With 2 mL it is 2 units; with 5 mL, 5 units.
- How many 1 mg doses are in a 100 mg GHK-Cu vial?
- 100. Taken once a day, that lasts about 100 days (14.3 weeks). The water you add does not change the count, only the size of each draw.
- 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 is why people mix it with more water than a 5 mg vial would get.
Educational reference. Pepdex does not sell peptides or recommend vendors. The calculator and charts convert amounts into syringe units; whether an amount is right for you is a question for a qualified provider.