A user reported that GHK-Cu can cause a significant burning sensation or “sting” upon injection, regardless of the dilution volume. They suggested that the discomfort might be related to the peptide’s pH or the copper ions themselves.
A user reported that GHK-Cu can cause a significant burning sensation or “sting” upon injection, regardless of the dilution volume. They suggested that the discomfort might be related to the peptide’s pH or the copper ions themselves.