BPC 157: Experimental Peptide Creates Risk for Athletes BPC 157: Miracle Healing Peptide or Hidden Danger? BPC 157 For Knee Pain: Early Reported Outcomes, A report on intra articular BPC 157 for knee pain described high rates of improvement: ~92% with BPC 157 alone, ~75% when combined with thymosin beta 4, New: An FDA decision to place 19 peptides on the unsafe list was supported by numerous documented safety concerns, former officials said. Even though demand for peptide therapies has exploded since then,