The blue color is from the copper ion, which may remain in the solution even after the GHK peptide chain has broken down
Nonetheless, extant clinical trials and vast research in animal models indicate a positive safety profile [17]
Vitamin therapy in Waunakee, WI, is generally very well tolerated when administered by trained professionals
Eur J Drug Metab Pharmacokinet 47(1):118 Ghavami S, Kerkhoff C, Los M, Hashemi M, Sorg C, Karami-Tehrani F (2004) Mechanism of apoptosis induced by S100A8/A9 in colon cancer cell lines: the role of ROS and the effect of metal ions
Another consideration is that sterile water by itself has no ions in some cases, injecting a large volume of pure water can cause discomfort (due to being hypotonic), so when used for injection, usually only small volumes are administered or the peptide is further diluted into a buffer or saline before use