Peptides take off as a DIY treatment but is that a good idea? : NPR In a major policy shift, the U.S. Food and Drug Administration is reconsidering restrictions on several controversial peptides, including trending compounds like BPC 157 and Melanotan II. The move comes as demand for What are peptides? FDA may ease restrictions on unproven health fad LiveNOW from FOX Peptides Lack Reliable Safety Information, Watchdog Warns The peptide problem: Hype is outrunning the evidence