GHK-Cu Dosage: Complete Guide to Protocols, Titration & Administration

Injectable GHK-Cu Dosing

Injectable GHK-Cu is administered via subcutaneous injection. Starting doses are conservative to establish tolerability, with the protocol adjusted based on your response and goals.

Standard starting dose is 1 mg daily for most patients. Hair restoration protocols commonly use 1–2 mg daily, sometimes combined with topical scalp application. Systemic regeneration protocols for deeper anti-aging effects typically use 2–3 mg daily, often with a cycling schedule of 4–6 weeks on followed by 2–4 weeks off to maintain receptor sensitivity and prevent potential copper accumulation.

Injectable GHK-Cu can be administered at any time of day. Morning injection is common to align with active daytime cellular repair processes, but physician guidance takes precedence. For the complete titration strategy and protocol variations by goal, see GHK-Cu Titration Strategies & Dosing Administration Guide.

Topical GHK-Cu Concentrations

Topical GHK-Cu is formulated in percentage concentrations rather than mg doses. The appropriate concentration depends on your primary treatment goal.

Preventive anti-aging protocols typically use 0.5%–1% applied once daily in the evening. Active skin repair protocols advance to 1%–2% applied once or twice daily. Clinical skin rejuvenation formulations prescribed by physicians reach 2%–3% concentration applied once daily. Scalp and hair restoration topicals are typically formulated at 1%–2% applied once daily directly to the scalp, not the hair shaft. Post-procedure recovery formulations use 0.05%–0.1% gel as directed by a physician following laser resurfacing, microneedling, or chemical peels.

For the complete usage guide for topical formulations including application technique and compatible skincare ingredients, see Topical GHK-Cu Serum Benefits & Usage Guide.

Reconstitution for Injectable GHK-Cu

Injectable GHK-Cu arrives as lyophilized powder requiring reconstitution with bacteriostatic water. The standard formula for syringe calculation uses a U-100 insulin syringe: divide your desired dose in mg by the concentration in mg/ml, then multiply by 100.

A critical distinction from other peptides: reconstituted GHK-Cu should appear clear with a faint blue-green tint — this is normal and characteristic of the copper complex. Do not discard it for this color. However, do discard if the solution appears cloudy, heavily discolored, or contains visible particles.

Never shake the vial, GHK-Cu is particularly sensitive to agitation because shaking disrupts the copper-peptide bond and reduces biological activity. Roll gently instead. Refrigerate immediately after reconstitution, store away from light (the copper complex is light-sensitive), and use within 28 days. Never freeze reconstituted GHK-Cu.

For complete concentration tables, worked syringe calculation examples for every common vial configuration, and the full reconstitution step-by-step, see the GHK-Cu Dosage Calculator and Interpreting GHK-Cu Dosage Calculator Results.

Injection Technique and Site Rotation

GHK-Cu injectable is administered subcutaneously, into the fatty tissue just beneath the skin. Preferred sites are the abdomen (at least 2 inches from the navel), front or outer thigh, and outer upper arm. For scalp-specific protocols, see Injectable GHK-Cu Scalp Protocols.

Rotate injection sites daily. Repeated injection at the same site can cause localized tissue reactions and, given GHK-Cu's copper content, potential copper accumulation at a single location.

For the complete self-administration guide covering both topical and injectable technique, safety preparation, and aftercare, see Self-Administer GHK-Cu Safely: Injection & Topical Guide and Injectable GHK-Cu Therapy Protocols & Aftercare.

What to Monitor During Treatment

For the complete lab monitoring recommendations during GHK-Cu therapy, see Recommended Labs & Monitoring for GHK-Cu Therapy.

Combination Protocols: Topical + Injectable

Many patients achieve their best results using both delivery methods simultaneously. Injectable GHK-Cu delivers systemic regenerative effects — including gene expression modulation, systemic anti-aging, and full follicle stimulation. Topical application concentrates the peptide at the specific surface areas of concern: face, neck, décolletage, or scalp.

The combination is particularly powerful for hair restoration, where topical scalp application paired with subcutaneous injectable creates both surface-level follicle stimulation and systemic copper peptide availability. For the full combined protocol framework, see Combination Topical & Injectable GHK-Cu Protocols.