Peptide BPC 157 Does It Work? Breaking Down the Evidence and the Hype BPC 157 has already hit the mainstream, but should it hit your bloodstream? What is BPC 157? Everything to know about this peptide RFK Jr. promotes peptides. Now the FDA weighs easing limits on the unproven chemicals New: An FDA decision to place 19 peptides on the unsafe list was supported by numerous documented safety concerns, former officials said. Even though demand for peptide therapies has exploded since then,