Are peptides steroids?

No. A peptide is a short chain of amino acids. A steroid is a four-ring lipid-derived hormone, the family that includes testosterone. Tesamorelin, semaglutide, and BPC-157 are peptides. Testosterone is a steroid, with its own pages on this site, not a peptide. Some growth-hormone secretagogues get discussed next to steroids in gym talk because both get used for body composition; that social grouping is not chemistry. MK-677 is a small molecule, not a peptide and not a steroid. Sharing a locker-room conversation is not a shared molecule class. This site does not rank them.

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.