Hormones that are found in the digestive system.

1. Gastrin
2. Cholecystokinin (CCK)
3. Secretin
4. Ghrelin
5. Leptin
6. Peptide YY (PYY)
7. Glucagon-like peptide-1 (GLP-1)
8. Insulin-like growth factor 1 (IGF-1)
9. Motilin
10. Somatostatin

- Gastrin: Stimulates the production of gastric acid and pepsin in the stomach.
- Secretin: Stimulates the pancreas to produce bicarbonate, which neutralizes stomach acid in the duodenum.
- Cholecystokinin (CCK): Stimulates the gallbladder to release bile into the duodenum and the pancreas to produce enzymes.
- Gastrointestinal inhibitory peptide (GIP): Inhibits gastric emptying and stimulates insulin release.
- Motilin: Stimulates gastrointestinal motility.