Peptide Deep Dives
What's a typical injectable dose of GHK-Cu?
Updated 2026-05-05
GHK-Cu (the copper-bound healing peptide) is most often injected at 1-2 mg once daily under the skin. Some clinics start lower at 0.5 mg to test tolerance before stepping up. The timing of day does not appear to matter much for skin or systemic effects, but most users pick mornings or evenings and stay consistent. Inject into fatty tissue on the belly, thigh, or near the area you want to heal. Bring the vial to room temp before injecting so the cold sting is gone.
IfIf you are new to GHK-Cu
Thenthen start at 0.5-1 mg daily for 7-10 days and watch for skin reactions before increasing
IfIf you are using it for systemic anti-aging or recovery
Thenthen 1-2 mg daily into the belly fat is the most commonly reported protocol
IfIf you have a localized injury or skin area
Thenthen some clinicians suggest injecting near the target tissue, though systemic dosing also reaches it through the bloodstream
IfIf you feel a metallic taste, nausea, or fatigue after dosing
Thenthen drop the dose to 0.5 mg and re-evaluate before increasing
Key facts
- Most reported injectable doses fall in the 0.5-2 mg per day range
- Some protocols use 5 days on, 2 days off to give the body a break from the copper load
- GHK-Cu is naturally found in human plasma; total body copper is about 80-100 mg, so 1-2 mg daily is well below toxic territory
- Subcutaneous absorption is slow and steady; bioavailability is much higher than oral
- GHK-Cu is not approved in the US as an injectable drug; the strong evidence base is for topical cosmetic use
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