Its simply not worth the risk
Observations are reported in study populations (usually animal or cell models), not guaranteed for any individual
GHK-Cu is generally well tolerated
You should seek medical attention if you develop swelling of the lips, throat or tongue, hives, difficulty breathing, fever, chills, or if lumps under the skin are raised, red, draining pus, warm to the touch, or severely painful
Insert the needle at a 45-degree angle with a quick, confident motion
Those with Compromised Skin Barriers in Research Settings: Its anti-inflammatory and wound-healing properties make it valuable for investigating skin barrier repair and recovery