Dr. Candace Pert considers the emergence of Mind-Body Medicine as an area of legitimate scientific research. Her site inter alia features discovery of the opiate receptor and medicine and the role of the emotions in health and consciousness.

The first neuropeptide to be identified was substance P, discovered by von Euler and Gaddum  in 1931. However, the chemical composition of substance P was not described until 1971, when Susan Leeman and her collaborators showed that substance P is a C‐terminal amidated, 11 amino‐acid residue peptide