Banned Substances Can Still be Sold Informed Sport Are Peptides Legal Again in 2026? Here is what RFK Jr. Just Announced Out with the Old & In with the New: FDA Bans Some Peptides (includes easy reference table) RFK Jr. wants Americans to use peptides that were banned over safety risks Ars Technica 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,