Peptide BPC 157 Does It Work? Breaking Down the Evidence and the Hype FDA Puts BPC 157, TB 500, and 5 Other Peptides Under the Microscope: What Prescribers Need to Know About the 503A Review Lengea The FDA's Ban of Therapeutic Peptides: A Threat to Health Freedom Slim 'n Sleek BPC 157 is one of the peptides that has been getting a lot of attention recently. It is a synthetic peptide derived from a protein found in human gastric juice. In experimental research, Peptides for Plastic Surgery: Weight Loss, Skin, Healing & Recovery