Substance P is an 11-amino-acid tachykinin neuropeptide that acts preferentially at the neurokinin-1 receptor, mediating pain transmission, neurogenic inflammation and stress responses in experimental models. Its involvement in nociception makes it a reference compound in pain and inflammation research. The peptide is supplied as a white lyophilized powder at >=99% HPLC purity in a sealed vial. Batch-specific data and worldwide delivery are provided. This product is offered alongside our full peptide catalog, so mixed orders can be combined to reduce shipping costs and simplify procurement. A dedicated service representative handles inquiries, order status and after-sales issues, and most questions receive a reply within one working day.