Peppermint

Parts Used & Where Grown

Peppermint is a hybrid of water mint and spearmint and was first cultivated near London in 1750. Peppermint is now cultivated widely, particularly in the U.S. and Europe. The two main cultivated forms are the black mint, which has violet-colored leaves and stems and a relatively high oil content, and the white mint, which has pure green leaves and a milder taste. The leaves are used medicinally.

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This supplement has been used in connection with the following health conditions:

Used for	Amount	Why
Gingivitis (Caraway, Chamomile, Clove Oil, Echinacea, Menthol, Myrrh, Sage)	0.5 ml in half a glass of water three times per day swished slowly in the mouth before spitting out	A mouthwash containing sage oil, peppermint oil, menthol, chamomile tincture, expressed juice from echinacea, myrrh tincture, clove oil, and caraway oil has been used successfully to treat gingivitis.
Gingivitis 0.5 ml in half a glass of water three times per day swished slowly in the mouth before spitting out A mouthwash combination that includes sage oil, peppermint oil, menthol, chamomile tincture, expressed juice from echinacea, myrrh tincture, clove oil, and caraway oil has been used successfully to treat gingivitis.² In cases of acute gum inflammation, 0.5 ml of the herbal mixture in half a glass of water three times daily is recommended by some herbalists. This herbal preparation should be swished slowly in the mouth before spitting out. To prevent recurrences, slightly less of the mixture can be used less frequently. A toothpaste containing sage oil, peppermint oil, chamomile tincture, expressed juice from Echinacea purpurea, myrrh tincture, and rhatany tincture has been used to accompany this mouthwash in managing gingivitis.³ Of the many herbs listed above, chamomile, echinacea, and myrrh should be priorities. These three herbs can provide anti-inflammatory and antimicrobial actions critical to successfully treating gingivitis. Learn More

Used for	Amount	Why
Indigestion, Heartburn, and Low Stomach Acidity	90 mg of oil plus 50 mg of caraway oil in enteric-coated capsules taken three times per day, for indigestion only	A combination of peppermint, caraway, and fennel has been shown to reduce gas and cramping in people with indigestion
Indigestion, Heartburn, and Low Stomach Acidity 90 mg of oil plus 50 mg of caraway oil in enteric-coated capsules taken three times per day, for indigestion only Carminatives (also called aromatic digestive tonics or aromatic bitters) may be used to relieve symptoms of indigestion, particularly when there is excessive gas. It is believed that carminative agents work, at least in part, by relieving spasms in the intestinal tract.⁴ Among the most notable and well-studied carminatives are peppermint, fennel, and caraway. Double-blind trials have shown that combinations of peppermint and caraway oil and a combination of peppermint, fennel, caraway, and wormwood have been found to reduce gas and cramping in people with indigestion.⁵ ^{, 6} ^{, 7} Generally, 3–5 drops of natural essential oils or 3–5 ml of tincture of any of these herbs, taken in water two to three times per day before meals, can be helpful. Alternately, a tea can be made by grinding 2–3 teaspoons of the seeds of fennel or caraway or the leaves of peppermint, and then simmering them in a cup of water (covered) for ten minutes. Drink three or more cups per day just after meals. Learn More

Used for	Amount	Why
Irritable Bowel Syndrome	0.2 to 0.4 ml in enteric-coated capsules, three times per day	Peppermint oil reduces gas production, eases intestinal cramping, and soothes irritation. It has been reported to help relieve IBS symptoms in two analyses of controlled trials.
Irritable Bowel Syndrome 0.2 to 0.4 ml in enteric-coated capsules, three times per day In the intestinal tract, peppermint oil reduces gas production, eases intestinal cramping, and soothes irritation.⁸ Peppermint oil has been reported to help relieve symptoms of IBS in two analyses of controlled trials.⁹ ^{, 10} Evidence supporting the use of peppermint oil has come from double-blind trials that typically have used enteric-coated capsules that supply 0.2–0.4 ml of peppermint oil taken two to three times per day.¹¹ ^{, 12} ^{, 13} ^{, 14} ^{, 15} Some trials have found peppermint oil ineffective.¹⁶ ^{, 17} The reason for these conflicting findings remains unclear. The combination of 90 mg of peppermint oil plus 50 mg of caraway oil in enteric-coated capsules taken three times per day led to significant reduction in IBS symptoms in a double-blind trial.¹⁸ In a similar trial, capsules that were not enteric-coated were as effective as enteric-coated capsules.¹⁹ The same combination has compared favorably to the drug cisapride (Propulsid) in reducing symptoms of IBS.²⁰ The purpose of enteric coating is to protect peppermint oil while it is passing through the acid environment of the stomach. Whole peppermint leaf is often used either alone or in combination with other herbs to treat abdominal discomfort and mild cramping that accompany IBS. The combination of peppermint, caraway seeds, fennel seeds, and wormwood was reported to be an effective treatment for upper abdominal complaints in a double-blind trial.²¹ Learn More

Used for	Amount	Why
Irritable Bowel Syndrome (Caraway Seed, Fennel Seed, Wormwood)	Refer to label instructions	A combination of peppermint, caraway seeds, fennel seeds, and wormwood was reported to be an effective treatment for upper abdominal complaints in one trial.
Irritable Bowel Syndrome Whole peppermint leaf is often used either alone or in combination with other herbs to treat abdominal discomfort and mild cramping that accompany IBS. The combination of peppermint, caraway seeds, fennel seeds, and wormwood was reported to be an effective treatment for upper abdominal complaints in a double-blind trial.²² Learn More

Used for	Amount	Why
Tension Headache	Spread a 10% oil solution across the temples three times over a 30-minute period	Peppermint is a soothing oil that appears to have pain-relieving effects when applied topically.
Tension Headache Spread a 10% oil solution across the temples three times over a 30-minute period A preliminary report suggested that peppermint oil has relaxing and pain relieving effects, and may be useful as a topical remedy for tension-type headache.²³ In a double-blind study, spreading a 10% peppermint oil solution across the temples three times over a 30-minute period was significantly better than placebo and as effective as acetaminophen in reducing headache pain.²⁴ Similar use of an ointment combining menthol and other oils related to peppermint oil was also as effective as pain relieving medication and superior to placebo in another double-blind study.²⁵ Learn More

Used for	Amount	Why
Chronic Candidiasis	Refer to label instructions	Volatile oils from peppermint have been shown to have significant antifungal action. Doctors recommend enteric-coated capsules, which break down in the intestines instead of the stomach.
Chronic Candidiasis Volatile oils from oregano, thyme, peppermint, tea tree, and rosemary have all demonstrated antifungal action in test tube studies.²⁶ A recent study compared the anti-Candida effect of oregano oil to that of caprylic acid.²⁷ The results indicated that oregano oil is over 100 times more potent than caprylic acid, against Candida. Since the volatile oils are quickly absorbed and associated with inducing heartburn, they must be taken in coated capsules, so they do not break down in the stomach but instead are delivered to the small and large intestine. This process is known as “enteric coating.” Some doctors recommend using 0.2 to 0.4 ml of enteric-coated peppermint and/or oregano oil supplements three times per day 20 minutes before meals. However, none of these volatile oils has been studied for their anti-Candida effect in humans. Learn More

Used for	Amount	Why
Colic	Refer to label instructions	This gas-relieving herb is usually given to the infant as a tea. Peppermint tea should be used with caution in infants, as they may choke in reaction to the strong menthol.
Colic Several gas-relieving herbs used in traditional medicine for colic are approved in Germany for intestinal spasms.²⁸ These include yarrow, garden angelica (Angelica archangelica), peppermint, cinnamon, and fumitory (Fumaria officinalis). These herbs are generally given by healthcare professionals as teas or decoctions to the infant. Peppermint tea should be used with caution in infants and young children, as they may choke in reaction to the strong menthol. Learn More

Used for	Amount	Why
Common Cold and Sore Throat	Refer to label instructions	Peppermint, a source of small amounts of menthol, is believed to work by acting on receptors in the nasal mucous membranes, leading to a reduction of nasal stuffiness.
Common Cold and Sore Throat Eucalyptus oil is often used in a steam inhalation to help clear nasal and sinus congestion. It is said to work similarly to menthol, by acting on receptors in the nasal mucous membranes, leading to a reduction of nasal stuffiness.²⁹Peppermint may have a similar action and is a source of small amounts of menthol. Learn More

Used for	Amount	Why
Gallstones	Refer to label instructions	In one study, a mixture of essential oils successfully dissolved gallstones. The most effective herb in that mixture is available only by prescription, but peppermint oil is similar to it.
Gallstones According to preliminary research, a mixture of essential oils dissolved some gallstones when taken for several months.³⁰ The greatest benefits occurred when the oils were combined with chenodeoxycholic acid, which is available by prescription.³¹ However, only about 10% of people with gallstones have shown significant dissolution as a result of taking essential oils. Peppermint oil is the closest available product to that used in the research described above. Use of peppermint or any other essential oil to dissolve gallstones should only be attempted with the close supervision of a doctor. Learn More

Used for	Amount	Why
Halitosis	0.5 to 8 grams daily	Volatile oils made from peppermint have antibacterial properties and may be effective in mouthwash or toothpaste form.
Halitosis 0.5 to 8 grams daily The potent effects of some commercial mouthwashes may be due to the inclusion of thymol (from thyme) and eukalyptol (from eucalyptus)—volatile oils that have proven activity against bacteria. One report showed bacterial counts plummet in as little as 30 seconds following a mouthrinse with the commercial mouthwash Listerine™, which contains thymol and eukalyptol.³² Thymol alone has been shown in research to inhibit the growth of bacteria found in the mouth.³³ ^{, 34} Because of their antibacterial properties, other volatile oils made from tea tree,³⁵ clove, caraway, peppermint, and sage,³⁶ as well as the herbs myrrh³⁷ and bloodroot,³⁸ might be considered in a mouthwash or toothpaste. Due to potential allergic reactions and potential side effects if some of these oils are swallowed, it is best to consult with a qualified healthcare professional before pursuing self-treatment with volatile oils that are not in approved over-the-counter products for halitosis. Learn More

Used for	Amount	Why
Low Back Pain	Refer to label instructions	A combination of eucalyptus and peppermint oil applied directly to a painful area may help by decreasing pain and increasing blood flow to afflicted regions.
Low Back Pain A combination of eucalyptus and peppermint oil applied directly to a painful area may help. Preliminary research indicates that the counter-irritant quality of these essential oils may decrease pain and increase blood flow to afflicted regions.³⁹ Peppermint and eucalyptus, diluted in an oil base, are usually applied several times per day, or as needed, to control pain. Plant oils that may have similar properties are rosemary, juniper, and wintergreen. Learn More

Used for	Amount	Why
Poison Oak/Ivy	Refer to label instructions	Cooling essential oils, such as peppermint, have also been used topically to relieve burning pain and itch.
Poison Oak/Ivy A great many plants have been used historically to treat skin inflammations like poison oak and poison ivy dermatitis. Examples include calendula (Calendula officinalis), blood root (Sanguinaria canadensis), Virginia snakeroot (Aristolachia serpentaria), holy basil (Ocimum tenuifolium), and chickweed (Stellaria media). None of these remedies has been subjected to controlled clinical studies to determine if they are safe and effective for this use. Cooling essential oils, such as peppermint and menthol, have also been used topically to relieve burning pain and itch. Such oils should not be applied full-strength, but should rather be diluted (for example in lotion or gel) to avoid further skin irritation. Learn More

Traditional Use (May Not Be Supported by Scientific Studies)

Recognized in the early 18th century, the historical use of peppermint is not dramatically different than its use in modern herbal medicine. Classified as a carminative herb, peppermint has been used as a general digestive aid and employed in the treatment of indigestion and intestinal colic by herbalists.

Also indexed as:

botanicals,
herbal dietary supplements,
herbal medicine,
herbal remedies,
herbal therapy,
herbalism,
Mentha piperita,
peppermint,
plant Medicine

About this treatment

Botanical names:

Mentha piperita

How It Works

Peppermint leaves yield approximately 0.1–1.0% volatile oil which is composed primarily of menthol (29–48%) and menthone (20–31%). Peppermint oil is classified as a carminative (prevents and relieves intestinal gas). It may also relieve spasms in the intestinal tract. Peppermint oil or peppermint tea is often used to treat gas and indigestion.

Three double-blind trials found that enteric-coated peppermint oil reduced the pain associated with intestinal spasms, commonly experienced in irritable bowel syndrome (IBS). However, another trial found no effect of peppermint on IBS. A double-blind trial found that an enteric-coated combination of peppermint and caraway oils was superior to a placebo for people with gastrointestinal complaints including IBS. A combination of peppermint, caraway seeds, and two other carminative herbs (fennel seeds and wormwood) was reported to be effective for gastrointestinal complaints including IBS in another double-blind study.

A tea of peppermint is a traditional therapy for colic in infants but has never been investigated in a human trial. Peppermint should be used cautiously in infants (see side effects below).

Peppermint oil’s relaxing action also extends to topical use. When applied topically, it acts as an analgesic and reduces pain. A trial of topical peppermint oil applied to the temples of healthy volunteers (with or without eucalyptus oil) found that peppermint oil had a muscle-relaxing action and it decreased tension. Topical peppermint oil alone reduced pain in people with tension headaches as well.

How to Use It

For internal use, a tea can be made by pouring 1 cup (250 ml ) of boiling water over 1 heaped teaspoon (5 grams) of the dried leaves and steeping for five to ten minutes. Three to four cups (750–1000 ml) daily between meals can be taken to relieve stomach and gastrointestinal complaints. Peppermint leaf tablets and capsules, 3–6 grams per day, can be taken. For treatment of irritable bowel syndrome, 1–2 enteric-coated capsules containing 0.2 ml of peppermint oil taken two to three times per day is recommended.

For headaches, a combination of peppermint oil and eucalyptus oil diluted with base oil can be applied to the temples at the onset of the headache and every hour after that or until symptom relief is noted.

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Last Review: 05-11-2011

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The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2011.

© 1995-2011 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.

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