BPC 157 penis growth: What the evidence and real world experience actually show Most people only hear about peptides after theyve spent years dealing with chronic inflammation, slow recovery, vascular issues, or unexplained fatigue., But the truth is this: your blood vessels age Can BPC 157 cause erectile dysfunction? Modulatory effects of BPC 157 on vasomotor tone and the activation of Src Caveolin 1 endothelial nitric oxide synthase pathway Scientific Reports BPC 157 has already hit the mainstream, but should it hit your bloodstream?