BPC 157 Review: Doctor Explains Benefits, Safety & Cancer Risk Q&A: Should you trust trending peptide injections? The FDA just announced that they're taking steps to lift restrictions on 12 peptides including BPC 157 and TB 500 making them accessible through compounding pharmacies again. This is a HUGE step 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, FDA to weigh easing limits on unproven peptides promoted by RFK Jr.