Substance P (7-11) is widely used in research to study neurokinin receptors, particularly the NK1 receptor, due to its role in modulating pain and inflammation. It is employed in experimental models to investigate the mechanisms of neurogenic inflammation and its potential therapeutic targets. Additionally, it is used in studies exploring the interactions between the nervous and immune systems, as well as in the development of drugs targeting conditions like chronic pain, migraines, and inflammatory disorders. Its truncated form retains biological activity, making it a valuable tool for understanding the physiological and pathological roles of Substance P in various tissues.