Is it safe to use peptides?

It depends on the peptide. Approved drugs like semaglutide have large safety records. Research chemicals like BPC-157 have little or no safety data in people. Semaglutide and tesamorelin are FDA approved, with safety data from many people. BPC-157 and TB-500 are unapproved research chemicals with little to no published safety data in people, at any dose. Whether a peptide is safe depends on the specific compound. This site's compound pages say exactly how much evidence in people exists for each one, including when the honest answer is not much.

Side effects by type of peptide, with the study that measured each one

Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use.

Part of research peptides, the category. What research peptides are, legally and practically, before getting into specific compounds.