Any time you do a subcutaneous injection, the fluid injected is absorbed by the blood vessels and lymph vessels in the subcutaneous tissue. There is a thick layer of fascia that is found at the BPC 157 Benefits, Dosage & Before After Results 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 Can you inject peptides into the knee?