BPC 157 (Body Protection Compound-157) is a pentadecapeptide made up of 15 amino acids. The amino acids sequence in BPC 157 is similar to a portion of the human BPC amino acid sequence. Human BPC is found in the gastric juice. Experiments have shown that BPC 157 enhances the healing of wounds, including tendons wounds such as transected Achilles tendons of rats. The aim of this study was to investigate the probable mechanism that BPC 157 utilizes to accelerate the healing process in an injured tendon.