Peptide Injection Site Reactions: What's Normal, What's Not, and What Revolution Health & Wellness When you inject peptides like BPC 157 over the area of pain, it does not directly go to the area of tissue damage initially. The medication is absorbed by the blood vessels in the subcutaneous tissue There's a common misconception about peptide injections that targeting them directly at pain sites is more effective than abdominal injection. However, when you inject peptides like BPC 157 BPC 157 For Back Pain: The Best Healing Option Prime IV