FDA moves toward easing restrictions on certain peptides BioPharma Dive Many have heard of BPC 157, and some people have heard of TB 500. The both of these are considered "healing peptides" however they have very different uses and can also be used in FDA Is Expected to Lift Restriction on Peptides, Heeding RFK Jr.'s Wishes The New York Times Peptides are often well tolerated, but they can still cause temporary reactions while the body adapts. Some commonly reported effects include: BPC 157 headaches, nausea, increased appetite TB 500