FDA moves toward easing restrictions on certain peptides BioPharma Dive 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, The FDA's Ban of Therapeutic Peptides: A Threat to Health Freedom Slim 'n Sleek Which non FDA (United States Food and Drug Administration) approved peptides, such as BPC 157 (Body Protection Compound 157) and TB 500 (Thymosin Beta 500), are likely legitimate for medical use under strict supervision?