What is BPC 157? Everything to know about this peptide Three Exercises to Heal Carpal Tunnel Syndrome Most people who talk about side effects from BPC 157 dont realize the problem isnt the peptide itself. The issue is that theyre getting unsterile, contaminated products from low quality research Dupuytren's contracture is caused by a fibroproliferative disease in which fibrous cords form in the hand, pulling one or more fingers into a bent position and interfering with hand function.