Oral BPC-157 is often discussed for gastrointestinal concerns because it passes through the digestive tract and appears relatively stable in acidic environments
This product is also referred to as glutathione for detox, glutathione antioxidant, and high-strength glutathione capsules
That regulatory warning should be weighed heavily when evaluating injectable GHK-Cu claims
This discussion compares tripeptides, exemplified by the well-studied GHK, with larger peptides such as the cyclic heptapeptide CyRL-QN15, the human cathelicidin-derived antimicrobial peptide LL-37, and the peptide Andersonin W-1 (AW1), containing 7, 37, and 72 amino acids, respectively [25, 67, 68]