OptiPin
AHK-Cu: calculator, dosing & the facts
Copper peptide complex (Ala-His-Lys-Cu) that supports skin health, wound healing, and collagen production. Similar to GHK-Cu but with slightly different properties. This is an evidence-graded reference – what it is, what it's used for, typical reported dosing, half-life, side effects, and how to track it. It is educational, not medical advice or a recommendation to use a research compound.
- • AHK-Cu – Longevity. Copper peptide complex (Ala-His-Lys-Cu) that supports skin health, wound healing, and collagen production.
- • Commonly used for skin rejuvenation and anti-aging, wound healing, collagen synthesis.
- • Half-life: Approximately 2–3 hours.
- • Status: Research use only · not FDA-approved – an educational reference, not a dose protocol or sourcing advice.
AHK-Cu calculator
Vial, water and dose in, syringe units out. Runs in your browser; nothing is sent anywhere.
Arithmetic only. The starting figures are the worked example in the reconstitution note on this page, not a dose recommendation. A U-40 syringe reads differently – see the syringe units chart. For a reusable pen, use the peptide pen calculator.
What AHK-Cu is
Copper peptide complex (Ala-His-Lys-Cu) that supports skin health, wound healing, and collagen production. Similar to GHK-Cu but with slightly different properties.
What AHK-Cu is used for
- • Skin rejuvenation and anti-aging
- • Wound healing
- • Collagen synthesis
- • Hair growth stimulation
- • Skin health
- • Topical cosmetic applications
These are reported/community uses, not proven clinical outcomes. Most research peptides have limited human trial data behind such claims.
Typical reported dosing
| Injectable | 1–5mg injected subcutaneously daily for skin effects |
| Topical | 5–20mg applied topically to skin daily |
Presented as commonly-reported patterns for information only – not a dose recommendation. AHK-Cu dosing is a decision for a qualified clinician.
Reconstitution
Reconstitute 50mg vial with 2mL bacteriostatic water. 1mg = 4 units. The arithmetic is the same for any peptide: concentration = vial mg ÷ water mL, and on a U-100 syringe 100 units = 1 mL. Compute your own vial with the calculator at the top of this page.
AHK-Cu dose-to-units chart
| Vial + water | Concentration | 1 unit holds | 1 mg |
|---|---|---|---|
| 50 mg + 2 mL | 25 mg/mL | 0.25 mg | 4 u |
Units on a U-100 insulin syringe, where 100 units = 1 mL. Red means under 5 units (a one-unit misread is a 20% dose error or worse) or over 100 (more than a 1 mL syringe holds). The dose columns are the worked examples in the reconstitution note above, shown as arithmetic, not as a recommendation.
Half-life & cycling
Half-life: Approximately 2–3 hours. Half-life drives dosing frequency and how quickly the compound clears – see it plotted on the AHK-Cu half-life calculator.
Cycling
Typical cycles: 10–20 days on, followed by 1–2 month break. Repeat every 4–6 months. Topical use can be more continuous.
Side effects & warnings
- an injection site that turns red, hot or hard, spreads, weeps, or comes with a fever – same-day medical care – research-grade material carries no sterility guarantee, so abscess and cellulitis are the documented consequence
- swelling of the lips, tongue or throat, trouble breathing, or widespread hives after a dose – emergency care
- • Skin irritation at the application site
- • Little human safety data exists either way
Research use only, with no approved product and no controlled human trials. Effects are extrapolated from GHK-Cu rather than measured for this peptide. Lower doses are often reported as sufficient.
Tracking AHK-Cu in OptiPin
If you're tracking a AHK-Cu protocol, OptiPin logs each dose with reminders and site rotation, charts the outcome you care about over your dose timeline, keeps per-vial inventory with runout warnings, and (where relevant) does the reconstitution math – all on-device, no account.
Log doses, outcomes & vials in OptiPin
Reminders, outcome-over-dose charts, vial runout warnings, and built-in reconstitution math – all on-device.
Download on the App StoreFAQ
What is AHK-Cu?
Copper peptide complex (Ala-His-Lys-Cu) that supports skin health, wound healing, and collagen production. Similar to GHK-Cu but with slightly different properties.
How many units is 1 mg of AHK-Cu?
On a U-100 insulin syringe, from a 50 mg vial with 2 mL of water it is 4 units (0.04 mL). The answer depends entirely on how much water went into the vial, so check your own vial with the calculator on this page. This is arithmetic, not a dose recommendation.
What is AHK-Cu used for?
Commonly discussed uses include: skin rejuvenation and anti-aging, wound healing, collagen synthesis, hair growth stimulation, skin health, topical cosmetic applications. These are reported uses, not proven outcomes or a recommendation.
How is AHK-Cu dosed?
Commonly reported dosing: Injectable – 1–5mg injected subcutaneously daily for skin effects; Topical – 5–20mg applied topically to skin daily. This reflects patterns discussed in the community and is presented for information only, not as a dose recommendation – AHK-Cu is not an approved medicine and dosing should involve a qualified clinician.
How do you reconstitute AHK-Cu?
Reconstitute 50mg vial with 2mL bacteriostatic water. 1mg = 4 units. On a U-100 syringe, 100 units = 1 mL. Concentrations vary by vial, so compute from your own vial with a reconstitution calculator.
What is AHK-Cu's half-life?
Approximately 2–3 hours. Half-life shapes how often it is dosed and how quickly it clears.
What are AHK-Cu's side effects?
Reported effects include: skin irritation at the application site, little human safety data exists either way. Because it is a research compound, its safety profile is not fully characterized; discuss risks with a clinician.
Evidence & further reading
- Search the peer-reviewed literature for AHK-Cu on PubMed (entry point to the primary evidence base, not a specific citation).
- AHK-Cu on ClinicalTrials.gov – registered human trials, if any.
- US FDA / 503A compounding status of research peptides (2026).
- OptiPin peptides guide – categories, evidence grading, and how to run a protocol honestly.
Related
Cartalax · Cortagen · Epitalon · GLOW · nad-plus · Reconstitution calculator · All peptides