Mentha × piperita. A natural hybrid of watermint and spearmint. Its oil is rich in menthol, which relaxes the smooth muscle of the gut.
What the research supports
A 2019 meta-analysis of 12 trials found enteric-coated peppermint oil improved overall IBS symptoms and abdominal pain. The American College of Gastroenterology suggests it for IBS. A large 2020 trial was more modest but still found benefits on pain and severity.
The dose that was actually studied
Enteric-coated peppermint oil capsules of about 180 to 225 mg, two or three times a day, for four to eight weeks.
What to look for on a label
- Enteric-coated capsules for IBS
- Teas and tinctures for occasional gas and indigestion
Who should not take it
- People with heartburn, GERD or a hiatal hernia
- Anyone taking antacids at the same time as enteric-coated capsules
- Young children: never apply peppermint oil near their face
Read the full guide: Peppermint for IBS: What the Research Really Shows.
This profile is for general education and is not medical advice. Talk to your doctor or pharmacist before starting a supplement, especially if you take medication or have a health condition.
