Vasoactive intestinal peptide

And peppermint.

And a whole lot of other stuff.

Erypsin (enzyme) in intestinal juice of large intestine breaks down the peptide chain into amino acids

Kirk D. Fischer has written:

'Intestinal growth in models of glucagon-like peptide-2 overexpression'

The drug Sandostatin mimics the natural hormone somatostatin. The drug has a variety of effects, these include: Inhibiting growth hormone, glucagon and insulin. It also inhibits the release of serotonin, gastrin, secretin and a variety of other biochemicals. Because of its properties, the drug has been used to treat some types of cancers, diarrhea and more.

dopamine