| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Vasoactive Intestinal Peptide | 100 | + | |
| 2 | Hypothalamic Hormones | 27 | + | |
| 3 | Opioid Peptides | 8 | + | |
| 4 | Tachykinins | 6 | + | |
| 5 | Delta Sleep-Inducing Peptide | 5 | + | |
| 6 | Pituitary Adenylate Cyclase-Activating Polypeptide | 3 | + | |
| 7 | Vasopressins | 3 | + | |
| 8 | Melanocyte-Stimulating Hormones | 2 | + | |
| 9 | Neuropeptide Y | 2 | + | |
| 10 | Galanin | 1 | + | |
| 11 | Thyrotropin-Releasing Hormone | 1 | + | |
| 12 | Urocortins | 1 | + |