Use this calculator to work out reconstitution volumes and per-administration draw amounts for GHK-Cu (Glycyl-L-Histidyl-L-Lysine-Copper). Enter your vial size, BAC water volume, and target dose — the calculator handles the volumetric maths and returns the exact volume, syringe units, and doses per vial.
For research and educational purposes only. This calculator performs volumetric mathematics on the values you enter; it does not recommend doses or provide medical advice.
Universal peptide & nootropic dose calculator
Standard research pen format: 3 mL total volume, 300 clicks per pen. That’s fixed — so the only thing that changes is how many mg are in your specific pen. mg per click = your pen’s mg ÷ 300.
Vial mode: for lyophilised powder vials you reconstitute yourself with bacteriostatic water. Tell us the vial mg, how much BAC water you added, and your target dose — we work out the exact volume to draw on a U-100 insulin syringe.
Research and educational purposes only. Not medical advice. Not for human consumption. This calculator performs volumetric mathematics on the values you enter; it does not recommend doses. Compounds listed are not licensed as medicines for human use unless stated otherwise.
About GHK-Cu
GHK-Cu is a copper-binding tripeptide composed of three amino acids (glycine, histidine, lysine) complexed with copper. It is supplied as a research-grade compound for laboratory study and is unscheduled under the UK Misuse of Drugs Act 1971. GHK-Cu is not licensed as a medicine in the UK for human use.
In published research literature, GHK-Cu has been examined in studies relating to skin regeneration, hair follicle biology, collagen synthesis, and extracellular-matrix remodelling. Topical and subcutaneous research administration are both described in literature.
Typical reconstitution / pen formats
| Format | BAC water | Concentration / mg per click | Volume to draw / clicks | For |
|---|---|---|---|---|
| 50mg vial | 5 mL BAC water | 10 mg/mL | 0.20 mL (20 units U-100) | for a 2mg target administration |
| 100mg vial | 5 mL BAC water | 20 mg/mL | 0.10 mL (10 units U-100) | for a 2mg target administration |
GHK-Cu dosing observed in research literature
Reported research-literature dose ranges for GHK-Cu in subcutaneous administration to laboratory animals fall predominantly in the 1–5 mg range per administration, with daily administration most commonly described. Topical preparations typically use lower per-application amounts.
These figures are reported here for completeness of the research-literature picture and do not constitute a dosage recommendation.
Half-life and frequency
GHK-Cu has a relatively short serum half-life (reported in hours in pharmacokinetic studies), which supports the daily-administration pattern described in most research literature.
Storage and shelf life
Lyophilised GHK-Cu powder is stable refrigerated. Reconstituted with bacteriostatic water it is typically stable refrigerated for approximately 28 days. Copper-binding peptides should be protected from prolonged light exposure as a precaution.
Frequently asked questions
How much bacteriostatic water do I add to a 100mg GHK-Cu vial?
A typical research-protocol choice is 5 mL of bacteriostatic water for a 100mg vial, giving a concentration of 20 mg/mL. This produces a 10-unit draw on a U-100 insulin syringe for a 2mg target administration.
Can GHK-Cu be used topically?
Topical research applications of GHK-Cu are described in published literature, particularly in skin-research contexts. Topical preparations are typically formulated at lower concentrations than subcutaneous preparations.
How long does GHK-Cu last after reconstitution?
Approximately 28 days refrigerated when reconstituted with bacteriostatic water. With sterile water only 24–48 hours.
Is GHK-Cu legal in the UK?
GHK-Cu is unscheduled under the Misuse of Drugs Act 1971 and is sold as a research-grade compound for laboratory use. It is not licensed as a medicine in the UK and is not approved for human consumption.
What is the GLOW stack?
The GLOW stack is a multi-compound research stack containing BPC-157, TB-500 and GHK-Cu. See our GLOW stack page for the multi-compound calculator.
Related compounds and stacks
Where to source research-grade GHK-Cu
For UK readers researching GHK-Cu, our partner supplier stocks research-grade preparations. (Partner link to be added after the affiliate arrangement is signed.) We do not sell peptides ourselves and are not responsible for any third-party supplier’s product quality, regulatory compliance, or customer service.
Compliance: Stackcalc.co.uk provides calculator tools and information for research and educational purposes only. We do not sell, supply, or recommend peptides, nootropics, or any other compounds. Content on this site does not constitute medical advice. Always consult a qualified healthcare professional. Not for human consumption.