Peppermint

Peppermint produces an inhibition of spontaneous peristaltic activity, reduces total gastrointestinal transit or gastric emptying, decreases the basal tone in the gastrointestinal tract, reduces the slow wave frequency in the esophagi, small intestine, which slows peristaltic movements, and inhibits potassium depolarization-induced responses in the intestine.

Active ingredients
Peppermint leaf and oil contain acetaldehyde, amyl alcohol, menthyl esters, limone, pinene, phellandrene, cadinene, pugelone, and dimethyl sulfide. Trace constituents include alpha-pinene, sabinene, terpinolene, ocimene, gamma-terpinene, fenchene, alpha- and beta-thujone, citronellol, and other compounds.