Peptide BPC 157 Dihexa Capsules LeadWest Medical A vial labeled "5 mg BPC 157" does not contain 5 mg of BPC 157. Every synthetic peptide comes with counterions charged molecules that pair with the peptide during purification. For Dihexa (also known as PNB 0408) is an experimental small molecule derived from angiotensin IV. It was engineered to cross the bloodbrain barrier and has shown synaptogenic effects in preclinical models. The often quoted