Can you inject peptides into the knee? Would a peptide like BPC 157 help chronic knee pain? BPC 157: Tendon Repair and More Gel injections for the knee involve the injection of a gel like substance into the knee joint to provide lubrication and cushioning. This treatment is often used to alleviate pain and improve mobility The Tiny Powerhouses: How Peptides Could Revolutionize Orthopedic Healing Regenexx at New Regeneration Orthopedics