BPC 157 has already hit the mainstream, but should it hit your bloodstream? Peptide side effects no one talks about BPC 157 headaches. TB 500 fatigue. CJC Ipamorelin water retention. Most people quit. But 90% of the time it's the protocol, not the peptide. Pentadecapeptide BPC 157 and the central nervous : Neural Regeneration Research BPC 157: Tendon Repair and More BPC 157: Experimental Peptide Creates Risk for Athletes