Ingredient guide
Peppermint oil is among the better-supported plant options for irritable bowel syndrome. Enteric-coated capsules can ease abdominal pain and overall symptoms. Heartburn is a common side effect, which the coating helps reduce.
Moderate evidencePeppermint oil is the concentrated essential oil of the peppermint plant. Its main active compound is menthol, the molecule behind that cool, tingling sensation. For gut use it is usually sold in enteric-coated capsules, a special coating designed to carry the oil past the stomach and release it lower down where it is needed.
Menthol blocks calcium channels in the smooth muscle of the gut wall. That muscle drives the squeezing and cramping behind much of the discomfort in irritable bowel syndrome. By relaxing it, peppermint oil acts as a natural antispasmodic. The enteric coating matters because it delivers the oil where it can work while limiting heartburn.
Peppermint oil stands out among plant options for IBS. Systematic reviews and meta-analyses find that it eases abdominal pain and improves overall symptom scores more than placebo, with one analysis reporting more than double the odds of improvement. It is the one botanical that shows up across adult and child IBS guidelines.
The honest caveats are about quality and side effects. The trials are often small, the overall quality has been rated low, and heartburn is more common with peppermint than placebo. Even so, we grade the evidence as moderate, which is strong for this field. For many people with IBS, enteric-coated peppermint oil is a sensible first thing to try.
For IBS, the research points to enteric-coated capsules of about 180 mg to 225 mg, taken two or three times a day before meals. The coating is important, so do not crush or open the capsules. If you have reflux or a hiatus hernia, or your gut symptoms are new or changing, see a healthcare provider before relying on it.
IBS trials typically use enteric-coated peppermint oil capsules providing about 180 mg to 225 mg, taken two to three times a day before meals. The enteric coating helps the oil reach the gut before dissolving, which reduces heartburn. Ask your healthcare provider before starting if you have reflux or a hiatus hernia.
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It relaxes the valve at the top of the stomach, which can let acid rise. Enteric-coated capsules reduce this by releasing the oil lower in the gut.
Use enteric-coated capsules of about 180 to 225 mg, two or three times a day before meals. Do not crush or open them, which removes the protective coating.
Not for IBS. The trials used concentrated, enteric-coated oil. Peppermint tea is pleasant but far weaker and is not the same as the studied product.