AP's BPC 157 peptide warning skips every doctor who disagrees Seattle Red BPC 157 has already hit the mainstream, but should it hit your bloodstream? BPC 157: Experimental Peptide Creates Risk for Athletes While not all peptides are orally bioavailable, BPC157 has been shown to be stable for over 24 hours in human gastric juice. I've personally used both oral and injectable BPC with myself BPC 157 has already hit the mainstream, but should it hit your bloodstream?