A: GHK-CU 50mg is reconstituted from lyophilised powder using sterile bacteriostatic water, sterile saline, or phosphate-buffered saline (PBS) at pH 7.4, depending on the experimental design
These are lyophilized powders that need to be reconstituted with bacteriostatic water (bac water)sterile water for injection containing a preservative, most commonly benzyl alcohol, to prevent bacterial growth
The highest reported use concentration is 14.2% in lipsticks
And you keep hearing about health benefits or harms of one of...
J Clin Pharmacol 41:846851 James LP, Mayeux PR, Hinson JA (2003) Acetaminophen-induced hepatotoxicity
As well as concerns about the purity of the products, Taylor noted that peptides produced for research purposes could contain other ingredients that were dangerous for humans, or bacterial endotoxins