GHK-Cu dosage calculator
Reconstitution math for GHK-Cu 50 mg and 100 mg vials, injectable dosage protocols for skin and hair, scalp mesotherapy dosing tables, GHK-Cu cycle length guidelines, loading dose protocols, and stack dosing with BPC-157. Everything calculated and tabulated so you can look up your exact dose in units.
Key takeaways
- Reconstitution formula: Vial amount (mg) ÷ BAC water volume (mL) = concentration (mg/mL). Then: target dose (mg) ÷ concentration (mg/mL) = injection volume (mL).
- For reconstituting GHK-Cu 50mg: 50 mg vial + 2 mL BAC water = 25 mg/mL. A 2 mg dose = 8 units on a U-100 syringe.
- Standard GHK-Cu injection dosage is 1–3 mg subcutaneous twice weekly for systemic protocols.
- Scalp mesotherapy dosage uses 0.5–1.5 mg total per session across 20–40 intradermal points.
- For GHK-Cu dosage for hair (topical): use 1–2% concentration serum applied daily for 6+ months.
GHK-Cu reconstitution calculator
Use this reference table to calculate how many units to draw for your target GHK-Cu injection dosage. The math: vial amount ÷ BAC water = concentration, then dose ÷ concentration = volume. All units assume a standard U-100 insulin syringe (1 mL = 100 units).
Reconstituting GHK-Cu 50mg
The most common vial size. Here is the complete reconstituting GHK-Cu 50mg reference:
| Vial | + BAC water | Concentration | 1 mg dose | 2 mg dose | 3 mg dose | Doses per vial (2 mg) |
|---|---|---|---|---|---|---|
| 50 mg | 1 mL | 50 mg/mL | 2 units | 4 units | 6 units | 25 |
| 50 mg | 2 mL | 25 mg/mL | 4 units | 8 units | 12 units | 25 |
| 50 mg | 3 mL | 16.7 mg/mL | 6 units | 12 units | 18 units | 25 |
| 50 mg | 5 mL | 10 mg/mL | 10 units | 20 units | 30 units | 25 |
Reconstituting GHK-Cu 100mg
| Vial | + BAC water | Concentration | 1 mg dose | 2 mg dose | 3 mg dose | Doses per vial (2 mg) |
|---|---|---|---|---|---|---|
| 100 mg | 2 mL | 50 mg/mL | 2 units | 4 units | 6 units | 50 |
| 100 mg | 3 mL | 33.3 mg/mL | 3 units | 6 units | 9 units | 50 |
| 100 mg | 5 mL | 20 mg/mL | 5 units | 10 units | 15 units | 50 |
| 100 mg | 10 mL | 10 mg/mL | 10 units | 20 units | 30 units | 50 |
GHK-Cu dosage protocols by use case
GHK-Cu dosage for skin (injectable)
| Protocol | Dose | Frequency | Weekly total | Cycle |
|---|---|---|---|---|
| Starter | 0.5–1 mg | Every other day | 1.5–3.5 mg | 8–12 weeks |
| Standard maintenance | 1–3 mg | 2x/week | 2–6 mg | 8–12 weeks |
| Aggressive loading | 2–5 mg | 3x/week | 6–15 mg | 4–6 weeks then taper |
GHK-Cu dosage for hair (injectable + topical)
For injectable GHK-Cu dosage for hair, the standard systemic protocol (1–3 mg SubQ twice weekly) provides follicle support through systemic distribution. For targeted scalp treatment, mesotherapy delivers GHK-Cu directly to follicles:
| Route | Dose | Frequency | Duration |
|---|---|---|---|
| Topical serum (1–2%) | 2–3 pumps to scalp | 1–2x daily | 6–12 months ongoing |
| Scalp mesotherapy | 0.5–1.5 mg total, 20–40 points | Weekly x 6–8, then monthly | 6–12 months |
| Systemic SubQ | 1–3 mg | 2x/week | 8–12 week cycles |
GHK-Cu + BPC-157 stack dosage
For combined healing protocols (see GHK-Cu vs BPC-157):
| Peptide | Dose | Frequency | Notes |
|---|---|---|---|
| GHK-Cu | 1–2 mg | 2x/week SubQ | Systemic — inject anywhere |
| BPC-157 | 250–500 mcg | 1–2x/day SubQ | Local — inject near injury |
GHK-Cu cycle length and scheduling
Standard GHK-Cu cycle length is 8–12 weeks, followed by a 4-week off period before repeating if desired. The rationale for cycling is to prevent potential receptor desensitization, though GHK-Cu’s multi-pathway mechanism makes true desensitization less likely than with single-receptor peptides. Many users in the GHK-Cu Reddit community run continuous low-dose protocols (1 mg twice weekly) without cycling, though this approach has no published safety data for long-term use.
GHK-Cu loading dose protocols (higher initial dosing for the first 2–4 weeks) are sometimes used to build tissue levels faster, then stepping down to maintenance dosing for the remainder of the cycle. A typical loading approach: 3–5 mg twice weekly for weeks 1–3, then 1–3 mg twice weekly for weeks 4–12.
Frequently asked questions
How do I reconstitute a 50mg GHK-Cu vial?
Add 2 mL of bacteriostatic water to the 50 mg vial (inject slowly down the side wall, never shake). This gives you 25 mg/mL. A 2 mg dose = 8 units on a U-100 insulin syringe. A 3 mg dose = 12 units. The vial provides 25 doses at 2 mg each. Store refrigerated after reconstitution and use within 3–4 weeks.
What is the standard GHK-Cu injection dosage?
The most commonly cited protocol is 1–3 mg subcutaneous twice weekly for 8–12 weeks. This dosage range appears most frequently in peptide community literature, compounding pharmacy protocols from the pre-Category-2 era, and aesthetic clinic practice.
What is the GHK-Cu dosage for hair growth?
For topical: use a 1–2% GHK-Cu serum applied daily to the scalp for 6–12 months. For injectable systemic support: 1–3 mg SubQ twice weekly in 8–12 week cycles. For scalp mesotherapy: 0.5–1.5 mg total per session across 20–40 injection points, weekly for 6–8 sessions then monthly.
How many weeks should a GHK-Cu cycle last?
Standard cycles are 8–12 weeks, with a 4-week break between cycles if repeating. Some users run continuous low-dose protocols without cycling, though this has no published long-term safety data.