BPC 157 and Penis Growth: What the Evidence Shows and What It Doesn't Most people who talk about side effects from BPC 157 dont realize the problem isnt the peptide itself. The issue is that theyre getting unsterile, contaminated products from low quality research The influence of a novel pentadecapeptide, BPC 157, on NG nitro l arginine methylester and l arginine effects on stomach mucosa integrity and blood pressure ScienceDirect Peptide BPC 157 Does It Work? Breaking Down the Evidence and the Hype