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
Dietary sources of Vitamin B12 include meat, fish, eggs, and dairy
This bacteriostatic (growth-inhibiting) property, rather than a bactericidal (bacteria-killing) effect, ensures that any contaminating microbes do not multiply
The technique differs from intramuscular injection, which uses longer needles and deeper penetration