Peppermint for Irritable Bowel Syndrome
A 2015 study found that 180mg of peppermint oil three times daily significantly improved symptoms of irritable bowel syndrome compared to placebo over 4 weeks. Peppermint has been shown to inhibit smooth muscle (intestinal) contractions. Peppermint is also anti-inflammatory and helps reduce bloating. Peppermint may cause acid reflux or other side effects.
Cash BD, Epstein MS, Shah SM. A Novel Delivery System of Peppermint Oil Is an Effective Therapy for Irritable Bowel Syndrome Symptoms. Dig Dis Sci. 2016 Feb;61(2):560-71. doi: 10.1007/s10620-015-3858-7. Epub 2015 Aug 29. PMID: 26319955; PMCID: PMC4729798.