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Peppermint (Mentha piperita) is a sterile, hybrid plant, created from the blending of watermint (Mentha aquatica) and spearmint (Mentha spicata). Peppermint is used for adding flavor or fragrance to several foods, cosmetics, soaps, toothpastes, mouthwashes, and other products - it is also popular for medicinal purposes.
Peppermint leaves can be used dried or fresh in teas.
Indigenous to Europe, peppermint today is cultivated all over the world.
Peppermint is popular as a traditional or folk remedy for several conditions and illnesses because of its calming effects, including flatulence, menstrual pains, diarrhea, nausea, depression-related anxiety, muscle and nerve pain, the common cold, indigestion, and irritable bowel syndrome.
This information article provides details on what peppermint oil is, the uses of peppermint in treating irritable bowel syndrome, calming skin irritation and itchiness, treating headache, alleviating symptoms of colds and flu, preventing nausea, and treating chemotherapy-induced vomiting. The article also mentions what precautions to take before using peppermint.
Peppermint oil is a concentrated oil made from the peppermint plant. Peppermint oil can be bought or made at home. The oil is extracted by steam distillation from the whole fresh or partly dried plant before it starts to flower.
According to an article in the scientific journal Natural Product Communications2, the chemical components of peppermint oil are menthol (40.7%), menthone (23.4%), as well as menthyl acetate, 1,8-cineole, limonene, beta-pinene and beta-caryophyllene.
A growing number of scientific studies have demonstrated that peppermint, in various forms, can help treat the symptoms of irritable bowel syndrome (IBS), including:
A study carried out by researchers at McMaster University3, Ontario, Canada, and published in the BMJ (British Medical Journal) concluded that doctors should recommend peppermint oil, fiber, and antispasmodics as first-line treatments for irritable bowel syndrome.
After looking at four trials involving 392 participants, lead researcher, Dr. Alex Ford and team found that peppermint oil was the most effective treatment when compared to antispasmodics and fiber.
A study published in the Mymensingh Medical Journal4 concluded that peppermint oil is effective in treating the symptoms of pain in diarrhea predominant IBS.
A study in the Belgian journal Revue Médicale de Bruxelles5 (article in French) acknowledged that "peppermint oil has an established visceral analgesic effect".
Dr. Stuart Brierley and team from the University of Adelaide's Nerve-Gut Research Laboratory in Australia discovered how peppermint activates an anti-pain channel in the colon6, resulting in less inflammatory pain in the gut.
Dr Stuart Brierley said:
"Our research shows that peppermint acts through a specific anti-pain channel called TRPM8 to reduce pain sensing fibres, particularly those activated by mustard and chilli. This is potentially the first step in determining a new type of mainstream clinical treatment for Irritable Bowel Syndrome (IBS)."
Peppermint oil is widely used for calming skin irritation and itchiness, as well as reducing redness.
Although a large number of people swear by peppermint oil for soothing their skin, there is a lack of scientific evidence to support or challenge this belief.
Alexander P. Roussos MS and Alan R. Hirsch MD, from the Smell and Taste Treatment and Research Foundation, Chicago, reported in the journal Headache7 that for people with alliaceous migraines "Nose plug and counter stimulation with peppermint prevented the onset of headaches and associated symptoms." Alliaceous migraines are those caused by onions, garlic and other alliums (usually the odor).
Applying peppermint oil onto the forehead has been found to be effective in the treatment of tension headache. An article in American Family Physician8 quotes two trials that demonstrated the efficacy of peppermint oil for relieving the symptoms of tension headache. In fact, one of them found peppermint oil to be as effective as acetaminophen (Tylenol, paracetamol).
Menthol, the main chemical component of peppermint, is a very effective decongestant. Decongestants shrink the swollen membranes in the nose, making it easier to breathe.
Menthol is also an expectorant. Expectorants loosen and bring up mucus from the lungs. Expectorants help people with coughs.
In an Abstract in the journal Phytomedicine9, scientists concluded "Based on its wide antimicrobial properties Olbas can be a useful agent for the treatment of uncomplicated infections of skin and respiratory tract". Olbas are complex essential oil distillates containing peppermint oil, eucalyptus oil, and cajuput oil.
Although many pregnant women with "morning sickness" say they have experienced benefits from using peppermint in various forms, studies have either been inconclusive or contradictory.
Researchers from the Fatemeh Zahra Fertility and Infertility Health Research Center, Iran, reported in the journal Iran Red Crescent Medical Journal10 that according to their study, peppermint essential oil does not have any beneficial effects on the symptoms of nausea and vomiting during pregnancy.
If you are pregnant and are taking or plan to take peppermint in any form, talk to you doctor. Studies are inconclusive regarding the benefits or harms in using peppermint during pregnancy.
A study published in Ecancermedicalscience11 concluded that peppermint oil is "safe and effective for antiemetic treatment in patients, as well as being cost effective".
Peppermint, like many other herbs, can interact with other herbs, supplements or drugs. Peppermint can also trigger side effects in some susceptible individuals.
If you are on any kind of medication, it is important to talk to your doctor about using peppermint.
Experts often recommend that you should not take peppermint if you:
Peppermint in various forms is also used for treating a number of other conditions, including dental plaque, shingles, urinary tract infection, and inflammation of the mouth. However, there is no scientific evidence to confirm its efficacy or safety.
According to the University of Maryland Medical Center, USA, test tube studies have found that peppermint kills some types of viruses, fungi and bacteria1.
Written by Christian Nordqvist
Copyright: Medical News Today
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Nordqvist, Christian. "What is peppermint? What are the benefits of peppermint?." Medical News Today. MediLexicon, Intl., 24 Aug. 2013. Web.
9 Dec. 2013. <http://www.medicalnewstoday.com/articles/265214>
Nordqvist, C. (2013, August 24). "What is peppermint? What are the benefits of peppermint?." Medical News Today. Retrieved from
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