Subcutaneous Injection Sites and Instructions for Safe Self Administration BPC 157 can be taken orally or subcutaneously, and for most people there is no difference in efficacy.Yes, some people will notice one works better than the other. Yes, some people will claim that I spent 4 months reporting on the peptide BPC 157 and its unlikely journey from a research lab in post communist Croatia to today's MAHA movement. Ask me anything. : r IAmA Stable Gastric Pentadecapeptide BPC 157 as Therapy After Surgical Detachment of the Quadriceps Muscle from Its Attachments for Muscle to Bone Reattachment in Rats BPC 157 Injection Dosage and Benefits for Chronic Pain Relief Can you inject peptides into the knee?