However, a closer comparison reveals that topicals are the best way to take GHK-Cu in terms of safety, cost, practicality, and targeted application
Zha S, Liu H, Li H, Li H, Wong KL, All AH
The reason for this is that salt acts as a fantastic thickener in cleansing formulas created with ionic cleansing agents (aka surfactants) such as Sodium Laureth Sulfate
Thats about just under 50 pence each
10.1186/s13075-017-1365-2 25
The mechanism work on this is active: GLP-1R is expressed in cardiovascular tissue, and receptor activation there appears to modulate inflammation, endothelial function, and possibly plaque biology through pathways that are not obviously downstream of insulin or appetite regulation