shoot of green peppermint, plant, enteric-coated peppermint oil

When you learn that an herbal medicine is helpful for some type of health condition, it may be a little tricky to sort out just which problems it helps. One reader found this especially troublesome with regard to peppermint. Having heard that peppermint oil helps irritable bowel syndrome but is bad for people with heartburn didn’t seem to make sense. The explanation relies on the form the botanical medicine takes. Enteric-coated peppermint oil acts in the lower intestine, not in the stomach.

Enteric-Coated Peppermint Oil Is Not for Indigestion:

Q. I am confused about using peppermint oil for digestive problems. You have written that it is helpful for symptoms of irritable bowel syndrome. But I read elsewhere you should avoid peppermint if you have GERD. Why the contradiction?

A. Peppermint (Mentha piperita) is not recommended for GERD (gastroesophageal reflux disease) or indigestion. That’s because peppermint is purported to relax the lower esophageal sphincter. This muscle at the bottom of the food tube helps keep stomach contents from splashing back into the esophagus and causing irritation. If it relaxes, symptoms of reflux can become worse.

When peppermint oil is administered in a special enteric-coated pill, however, the pill gets through the stomach without dissolving. The peppermint oil then can act lower in the digestive tract. Studies have shown that such formulations can ease symptoms of irritable bowel syndrome (IBS) (Khanna, McDonald & Levesque, Journal of Clinical Gastroenterology, July, 2014).

Some Peppermint Oil Research:

A presentation at the Digestive Disease Week annual meeting (May 18, 2015) demonstrated the effectiveness of enteric-coated peppermint oil for relieving symptoms of irritable bowel syndrome, also called IBS. A small double-blind study compared slow-release ultra-purified peppermint oil to placebo. After 24 hours, the peppermint oil had reduced symptoms by 30% compared to about 20% with placebo.

After a Month, IBS Results Improved More:

By the time the volunteers had received the treatment for four weeks, those getting peppermint oil had nearly 80% fewer symptoms compared to a 40% reduction in the placebo group. The investigators believe that L-menthol delivered to the small intestine is the active component.

Because all the study participants were selected according to strict criteria for IBS, this is the most rigorous study to date of a traditional folk remedy for tummy troubles. We have written about previous studies that suggested enteric-coated peppermint oil could be beneficial, although they were less stringent. People who wish to take peppermint oil should check with their clinician first, as peppermint oil (or possibly L-menthol) can interact with a number of medications.

One reader shared this:

“My daughter suffered from IBS in high school. Enteric-coated peppermint oil capsules before each meal did the trick. She took them for a couple of years and no longer needs them.”

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  1. Virginia P

    My husband was having bloating and slight heartburn and began taking 1 Pepogest (enteric coated peppermint oil) at bedtime. His blood pressure went from below 120/80 to 160-180/100! Please read Peppermint and High Blood Pressure ( before beginning to take this product.

  2. Bets

    I have GERD and Barretts esophagus and did not want to take Pepcid simply because of the ‘rebound effect’ so I thought I would try chewing on some crystallized ginger from the health food store. It works miracles and I have been lucky enough to just use this. I love this!! It changed my life.

  3. Kirk
    St. Paul, MN

    This explains a lot. I had always heard of peppermint for digestion, but cannot tolerate it in candy as it always aggravates my indigestion and reflux. Thought I might be allergic to it. Now I know why I don’t tolerate it.

  4. Brent
    Northwest Illinois

    I always keep the enteric-coated peppermint oil “pearls” or ovals in the pill container in my change purse, in case my GI system goes into overdrive. Like you explained, you don’t want to take these for heartburn and they also aren’t recommended if you have a hiatal hernia. But most people should be able to drink peppermint tea for nausea. In this form it seems to actually speed up digestion. And finally, I discovered recently that peppermint tea bags make an excellent mouse repellent. Just put them where the rodents tend to go and they may actually pack up and leave the way they did for me!

  5. cate
    Bethlehem PA

    I found that the gel-caps sold by NOW supplements company were helpful for symptoms of irritable bowel syndrome, during a time of ongoing emotional stress. The gels contain peppermint along with ginger and fennel. Don’t know whether gels qualify as “enteric-coated” or not, but my bowels acted normally while I was taking these.

    • Susan
      Peachtree City GA 30269

      can you tell me where I can purchase these pills, I suffer from IS

      • Tammy

        I just found them on Amazon. Search “NOW Peppermint Gels with Ginger & Fennel Oils” $9.39 for 90 pills.

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