Federal health advisers are meeting to review more than a half-dozen peptides, unproven substances that have become a growing wellness trend despite little evidence they are safe or effective.

Federal health advisers are meeting to review a group of controversial chemicals called peptides. The unapproved injections ...

† Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, U.K. ‡ Department of Materials, Oxford University, Parks Road, Oxford OX1 ...