Injections that need to reach deep muscle tissue may benefit from using a needle designed to penetrate barriers easily, such as the RELI Safety Hypodermic Needle with Pre-attached Luer Lock Syringe , that comes in a variety of sizes
As this article has outlined, the honest answers are troubling
Qualified Supervision: All GHK-Cu injections should be performed or supervised by a licensed medical professional (e.g., doctor, nurse practitioner)
Structurally and biochemically, GHK-Cu functions as a carrier and regulator of bioavailable copper an essential cofactor for enzymes in antioxidant defense (e.g., Cu/Zn-SOD), collagen cross-linking (lysyl oxidase), and angiogenesis
Histological analysis revealed significant improvements in the structure of the liver, kidneys, pancreas, and intestine