When U.S. health officials meet next month to reconsider a list of controversial peptide drugs, they will hear from a new set of voices: doctors and pharmacists with deep financial ties to the burgeoning industry of unproven chemicals.

Several popular peptide injections have been praised by Health Secretary Robert F. Kennedy Jr.

The Food and Drug Administration is meeting next month to consider easing restrictions on several peptides, a group of unapproved drugs popular with followers of Robert F.