US Health and Human Services Secretary Robert F. Kennedy Jr. has called himself a “big fan” of peptides and recently described using BPC-157 to treat a muscle injury.
Chris O'Meara/AP
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A plan to give people in the United States easier access to unproven peptide drugs favored by Health Secretary Robert F. Kennedy Jr. was opposed by most Food and Drug Administration scientific staff members, who had limited input in drafting the policy, according to six people familiar with its development.