FDA to weigh easing limits on unproven peptides promoted by RFK Jr. RFK Jr. promotes peptides. Now the FDA weighs easing limits on the unproven chemicals FDA will consider easing restrictions on peptides as RFK Jr. calls himself a "big fan" CBS News Imagine a compound that accelerates healing, reduces inflammation, and supports muscle recoverythat's BPC 157. This powerful peptide is derived from gastric juice and works by increasing growth factors at the site of