Ingredient or product comparison
GHK-Cu Injection: Method Comparison
Subcutaneous (Abdomen) 29–31G, 0.5 inch 0.5–1 inch into fat layer Moderate (peaks 2–4 hours) Standard dosing, consistent absorption Preferred for most users. Largest subq area, easiest self-administration Subcutaneous (Thigh) Alternative site rotation Equally
This source-based comparison does not add ratings or recommend a winner.
- Subcutaneous (Abdomen)
- 29–31G, 0.5 inch
- 0.5–1 inch into fat layer
- Moderate (peaks 2–4 hours)
- Standard dosing, consistent absorption
- Preferred for most users. Largest subq area, easiest self-administration
- Subcutaneous (Thigh)
- Alternative site rotation
- Equally effective but harder to pinch tissue for single-handed injection
- Intramuscular (Thigh)
- 25–27G, 1 inch
- 1–1.5 inches into muscle
- Faster (peaks 1–2 hours)
- High-dose protocols (>5mg)
- Not standard for GHK-Cu. Muscle injection increases bruising risk and doesn't improve efficacy
- Intradermal (Forearm)
- 30–32G, 0.25 inch
- Just under skin surface
- Slowest (peaks 4–6 hours)
- Localised skin studies
- Difficult technique, causes welts, not recommended for systemic dosing