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Peppermint essential oil: what it may help, how to use it, and how to choose a bottle
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- Single-ingredient peppermint essential oil with dropper cap. Best for: Diffuser use and making your own diluted blends. See options on Amazon
- Prediluted peppermint roll-on. Best for: People who want to apply peppermint to temples or neck without mixing. See options on Amazon
- Ultrasonic essential oil diffuser. Best for: Scenting a room you spend time in. See options on Amazon
- Peppermint aromatherapy inhaler stick. Best for: Personal scent use while away from home. See options on Amazon
- Fractionated coconut or jojoba carrier oil. Best for: Diluting peppermint oil for massage or skin use. See options on Amazon
What peppermint essential oil is
The National Center for Complementary and Integrative Health (NCCIH) describes peppermint as a natural cross between water mint and spearmint. The oil is extracted from the plant's flowering parts and leaves. Mint has a long history in digestive remedies, and today peppermint oil is promoted for irritable bowel syndrome (IBS), indigestion, headaches, muscle tension and nausea.
A bottle of essential oil and a peppermint oil supplement are not the same product. Essential oils sold for aromatherapy are meant to be inhaled or diluted on the skin, the two routes the National Cancer Institute (NCI) describes. The capsules studied for IBS are a dietary supplement with an enteric coating, which NCCIH says may help reduce reflux-related side effects. Never use a dropper bottle as a substitute for a capsule.
Peppermint essential oil benefits: what the evidence shows
| Use | What NCCIH reports | How it was used |
|---|---|---|
| Irritable bowel syndrome | A 2022 review of 10 studies with 1,030 participants found peppermint oil beat placebo for overall symptoms and abdominal pain, with more mild side effects such as reflux | Enteric-coated capsules by mouth |
| Nausea from chemotherapy | Limited evidence; a 2024 aromatherapy review included 4 peppermint studies with 290 participants and reported a benefit from inhalation | Inhaled |
| Tension headache | Limited evidence that it may help | On the skin |
| Indigestion | Peppermint oil alone lacks support and may worsen indigestion in some people | By mouth |
| Most other conditions | Not enough evidence to draw conclusions | Various |
So the honest summary: peppermint oil has real research behind it for IBS in capsule form, and only limited evidence for nausea and headaches with the essential oil. If you use it for nausea, NCI's review of aromatherapy shows how mixed this area is: it reports that inhaled ginger oil somewhat decreased acute nausea in one chemotherapy study but did not lessen vomiting. These findings do not establish treatment for every cause of nausea. Discuss aromatherapy with your care team and keep prescribed nausea treatment in place.
How to use it: diffuser, inhaler or diluted on skin
- Diffuser. NCI describes indirect inhalation as a room diffuser that spreads the oil through the air, or a few drops on a nearby tissue. Follow your diffuser's instructions for how many drops to add and how long to run it.
- Personal inhaler. An aromatherapy inhaler stick keeps the scent close to you rather than filling a room, which is useful when others in the home do not want it. See our guide to aromatherapy inhaler sticks.
- On the skin. NCI says essential oils for massage are mixed into a carrier oil before they go on the skin. Use a prediluted roll-on or follow a dilution chart on the product label, and test a small patch first.
- Not by mouth. NCI says swallowing large amounts of essential oils is not recommended. Keep the bottle where children cannot reach it.
Safety: who should be careful
- Babies and young children. NCCIH says the menthol in peppermint can harm infants and young children if inhaled, so peppermint oil should not be applied to their faces. Avoid exposing babies and young children to the vapor; ask a pediatrician about any proposed use.
- Skin. NCCIH lists rashes and irritation as side effects on the skin, and NCI notes allergic reactions and irritation can occur when oils stay on the skin for long periods. Do not put oil inside your nose: NCCIH says reliable safety information for that route is lacking.
- Pregnancy and breastfeeding. NCCIH says food amounts are likely safe, but oral medicinal amounts are poorly studied. Ask a clinician before use while pregnant or breastfeeding; keep oil away from skin an infant contacts. NCCIH says nipple applications must be wiped off before feeding, so do not use a DIY nursing remedy.
- Medicines. NCCIH advises talking with your health care provider before using herbal products if you take medications, since some interactions can be harmful.
- Pets. Ask your vet before diffusing any essential oil in a room your pet uses.
How to choose a bottle of peppermint oil
- Read the label for what is inside. A single-oil bottle should name peppermint as the only ingredient. Blends and prediluted roll-ons list a carrier oil too, so check that the selected product is intended for your chosen skin or diffuser use.
- Look past the marketing words. FDA says natural or organic labels do not indicate safety, and that it has no regulatory definition for those terms in cosmetics.
- Be wary of health claims. FDA says regulation depends on intended use: cosmetic fragrance products generally do not need premarket approval, while claims to treat disease, ease pain or help sleep are drug claims and bring drug requirements. A marketing claim alone does not establish clinical benefit.
- Choose usable dispensing directions. A dropper can help you follow the selected label, but counting drops alone does not establish a safe skin dilution or dose. Check the product and diffuser instructions.
Building a small collection? Compare lavender and eucalyptus oils, or an essential oil set.
What to look for when you buy
Single-ingredient peppermint essential oil with dropper cap
Best for: Diffuser use and making your own diluted blends
A bottle that lists only peppermint gives you full control over how much goes into a diffuser or carrier oil. NCI describes diffusers and carrier-oil dilution as standard ways to use essential oils.
Watch out: Undiluted oil is strong; never swallow it, and keep it out of reach of children.
See options on AmazonPrediluted peppermint roll-on
Best for: People who want to apply peppermint to temples or neck without mixing
NCCIH reports limited evidence that applying peppermint oil to the skin may help tension headaches, and NCI says oils go on the skin mixed in a carrier oil. A roll-on comes already diluted.
Watch out: Keep it away from the eyes, and do not use it on the faces of babies or young children.
See options on AmazonUltrasonic essential oil diffuser
Best for: Scenting a room you spend time in
NCI lists a room diffuser as the usual form of indirect inhalation. An ultrasonic model with a timer lets you run it for a set period rather than all day.
Watch out: It scents the whole room, so check with others in the home and ask a vet about pets.
See options on AmazonPeppermint aromatherapy inhaler stick
Best for: Personal scent use while away from home
A portable inhaler is a format to compare if you want scent near you rather than a room diffuser. The cited chemotherapy nausea findings do not establish that an inhaler treats motion sickness or every cause of nausea.
Watch out: Do not put oil inside the nose. Evidence is limited; discuss persistent nausea or vomiting with a clinician.
See options on AmazonFractionated coconut or jojoba carrier oil
Best for: Diluting peppermint oil for massage or skin use
NCI says essential oils for massage are mixed into a carrier oil before use, which lowers the strength that touches your skin.
Watch out: Patch test the blend first, and stop if you get a rash.
See options on AmazonQuestions people ask
- Can peppermint essential oil help with nausea?
- NCCIH reports limited chemotherapy-related evidence: a 2024 aromatherapy review included 4 peppermint studies. This does not establish benefit for every cause of nausea or replace prescribed treatment; discuss use with your care team.
- Is it safe to put peppermint oil in a diffuser?
- NCCIH says inhaled aromatherapy is possibly safe but information is limited. Use only the drops your diffuser's directions suggest and avoid diffusing it around babies and young children, since menthol can harm them if inhaled.
- Can I take peppermint essential oil by mouth?
- Do not swallow essential oil from a dropper bottle. NCI says swallowing large amounts of essential oils is not recommended. The IBS research used enteric-coated capsules, which are a different product; ask your doctor about them.
- Does peppermint oil help headaches?
- NCCIH says there is limited evidence that applying it to the skin may help tension headaches. Dilute it first and keep it away from your eyes.
- What are the side effects of peppermint essential oil?
- On the skin, NCCIH lists rashes and irritation. Allergic reactions are rare. By mouth, side effects can include heartburn, nausea, abdominal pain and dry mouth.
Sources
- Peppermint Oil: Usefulness and Safety (nccih.nih.gov), National Center for Complementary and Integrative Health (NIH)
- Aromatherapy With Essential Oils (PDQ), Patient Version (cancer.gov), National Cancer Institute
- Aromatherapy (fda.gov), U.S. Food and Drug Administration