Peptide TerminologyNonapeptidePeptide composed of nine amino acids.Research use only. For in vitro research use only. Not for human or animal consumption. Not for human consumption, medical use, or personal application.Oxytocin is a cyclic nonapeptide referenced in neuroendocrine research literature.Updated 2026-06-01Related termsPeptideRelated catalog productsOxytocin 10mg · 10 mgRelated compoundsOxytocin← Full glossary