Ingredient or product comparison
GHK-Cu Injection Sites: Anatomical Location Comparison
Abdomen (periumbilical) High. Extensive capillary networks feeding peritoneal circulation 8–12mm in most adults 45–60 minutes 4 quadrants, allows 10–14 day rest per site Consistent bioavailability, easy self-administration, best overall choice Anterior Thigh (
This source-based comparison does not add ratings or recommend a winner.
- Abdomen (periumbilical)
- High. Extensive capillary networks feeding peritoneal circulation
- 8–12mm in most adults
- 45–60 minutes
- 4 quadrants, allows 10–14 day rest per site
- Consistent bioavailability, easy self-administration, best overall choice
- Anterior Thigh (vastus lateralis)
- Moderate-high. Good capillary density, slightly lower than abdomen
- 6–10mm (leaner in athletes)
- 50–70 minutes
- 4 zones (2 per leg), robust rotation capacity
- Lower injection discomfort, accessible for most users, good abdomen alternative
- Deltoid (upper arm)
- Moderate. Adequate vascular supply but less subcutaneous tissue
- 4–8mm (highly variable by muscle development)
- 60–80 minutes
- Limited. 2 sites total, requires longer rest periods
- Convenience when abdomen/thigh unavailable, less ideal for frequent protocols
- Lateral Hip/Gluteal
- Low-moderate. Thicker adipose, lower capillary density
- 12–20mm+ (highly variable)
- 90+ minutes, unpredictable
- Poor. Difficult self-administration, inconsistent depth
- Not recommended. Slowest absorption, hardest to rotate effectively