FDA to weigh easing limits on unproven peptides promoted by RFK Jr. Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications, and Future Perspectives What are peptides? The treatments promising weight loss and better skin, explained Vox Have you thought about taking peptides that aren't approved by the FDA? Think again. CBS News' chief medical correspondent, @drlapook, shares a cautionary tale from medical history about why testing