Approximately 7-8 days, supporting once-weekly research administration
A 2016 study published in Nature Scientific Reports showed GHK-Cu produced no cytotoxicity to human keratinocytes at concentrations up to 5,800 micromolar over 72 hours and did not induce inflammatory biomarkers unlike other copper compounds
This is one of the most searched aspects of peptide therapy, and for good reason dosing protocols vary significantly depending on the delivery method
The longest animal studies on BPC-157 span approximately 4 weeks to 12 weeks, leaving the safety profile for use extending beyond 3 months entirely undocumented in peer-reviewed literature
Clean the injection site with an alcohol prep pad, pinch a fold of skin, insert the needle at a 45-90 degree angle (depending on body fat levels), inject slowly over 3-5 seconds, and dispose of used syringes immediately in a sharps container