Why would a patient trust a peptide more than a statin? STAT What are peptides? The treatments promising weight loss and better skin, explained Vox FDA Approval of Vaccines and EUA Infographic Vanderbilt Institute for Infection, Immunology and Inflammation Everyone online is suddenly injecting peptides. But almost nobody understands the scienceor the regulation. The FDA recently shifted several peptides off the Category 2 safety risk list tied to compounding rules. First, that New: An FDA decision to place 19 peptides on the unsafe list was supported by numerous documented safety concerns, former officials said. Even though demand for peptide therapies has exploded since then,