BPC 157: Experimental Peptide Creates Risk for Athletes BPC 157 Therapy and the Permanent Occlusion of the Superior Sagittal Sinus in Rat: Vascular Recruitment BPC 157 free base CAS#137525 51 0 cytoprotective agent Dr. TLDR: BPC 157 has not been proven to cause cancer. But it has also not been proven safe in people with active cancer, recent cancer, premalignant conditions, suspicious lesions, or high