What are Peptides?

Peptides are short chains of amino acids. Many of the body's hormones and signaling molecules are peptides, including insulin and growth hormone-releasing hormone. Some peptide drugs are FDA-approved for specific conditions, while many peptides marketed for aging or performance are not approved and cannot legally be compounded.

Researchers study peptides because they can act on specific receptors and pathways. FDA-approved peptide medications include insulin and GLP-1 receptor agonists such as semaglutide. Claims that peptides reverse aging, build muscle or improve skin are largely based on early research and are not FDA-approved uses.

Whether a peptide can be prescribed depends on its FDA status and whether it may be compounded under federal rules. A licensed provider can explain which options are FDA-approved, which are compounded or off-label, and their risks.