Re-using syringes, not swabbing the vial tops, or working in a dirty environment are all invitations for contamination
However, as reassuring as all of this is, there are a couple of things to remain mindful of: Copper toxicity Because GHK-Cu contains copper, it does pose a potential risk of copper toxicity,12 the symptoms of which include abdominal pain, vomiting, chest pain, chills, cough, fever, general weakness, anemia, burning sensations, tremors, and a metallic taste in the mouth.13 The risk is small, as the concentrations of copper in the peptide are typically well within safe parameters, but its good to be aware of it
Always follow up with sunscreen in the morning to protect your glow from UV rays
Once you manage to open the packet, the mask and excess serum come out easily