Most peptides arent orally bioavailable and they get broken down in the stomach. BPC 157 is a notable exception, especially the arginate salt, which is the superior form when it comes to oral CRE8 Compounding Pharmacy Supplements BPC 157 Erectile Dysfunction: What the Evidence Shows and Practical Considerations Frontiers Stable binding to phosphatidylserine containing membranes requires conserved arginine residues in tandem C domains of blood coagulation factor VIII BPC 157 and erectile dysfunction: what the evidence and real world experience actually show