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Peppermint (Mentha piperita) – Willamette Valley

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Peppermint essential oil

(Mentha piperita), Peppermint -Willamette, Steam Distilled (single distillation), ethically farmed in the USA from the leaves - temporarily out of stock

10 mL and 15 ml sizes available with safety dropper cap

The following properties have been attributed to this essential oil in research and literature:

  • Mental stimulant and energizing
  • Anti-fungal
  • Anti-coagulant (should not be used in conjunction with Coumadin or Plavix)
  • Relieves migraines
  • Cough suppressant
  • Anti-bacterial
  • Relieves allergic symptoms
  • Antispasmodic
  • Insecticide
  • Relieves nausea or digestive upset
  • Can be quite irritating to skin and mucous membranes if not diluted prior to use
  • Cooling and often used for muscular aces and pains
  • Read our "safety/usage" tab for new cautions from NAHA

For additional, in-depth information, including safety precautions, see the tabs below and our Essential Oil Database.

This peppermint is new for us - we like to purchase essential oils from distillers in the United States, but, of course, not a lot of oils are best grown or distilled here - yet. This one is and is a classic distilled in the Willamette Valley of Oregon. The menthol percentage is lower and the fragrance is "greener" for lack of a better term. I love it when I don't want the crisper, sharper scent of regular peppermint. For additional information about how peppermint is farmed and distilled in this area see here. 


Menthol - 42%
Menthone - 22%
1,8-Cineole - 5%
Menthyl acetate - 5%
Isomenthone - 3%
Germacrene D - 2%
Menthofuran - 2%

Pure, unadulterated, undiluted, ethically farmed Mentha piperita essential oil.

In addition to a large amount of safety advice from NAHA, see below, we are also detailing the safety advice per "Essential Oil Safety, 2nd Edition" - Oral and dermal restrictions that are mentioned are based on 8% menthhofuran (ours is much lower than that at 2%) and 3% pulegone. With those amounts in mind potential hazards mentioned are cholerectic, neurotoxicity, mucous membrane irritation (low risk). The contraindications mentioned for both internal and external routes would include cardiac fibrillation, G6PD deficiency (enzyme deficiency inherited). Do not apply to or near the face of infants or children.

Oral contraindications mentioned are cholestasis. We, of course, do not recommend oral use of any essential oils without guidance from a qualified aromatherapy professional. Robert Tisserand cautions oral doses for those with gastroesophageal reflux disease (GERD) which is something to consider since peppermint is often used for digestive disorders and nausea. He states the maximum adult daily oral dose of 152 mg - we again reiterate our cautions about internal usage of any essential oils.

Maximum dermal use at 5.4%. As peppermint is a commonly used essential oil, it should be noted that Mr. Tisserand devotes quite a few pages to a detailed review of additional cautions and safety information. I personally suggest that if you are in the daily practice of using essential oils, that you contact and confer with a qualified professional aromatherapist and/or purchase his quite well-researched and detailed book.

Peppermint essential oil is widely used and because of this, often misrepresented as being completely safe. It is safe when used diluted and with knowledge of cautions that apply to this oil. I was happy to see that the National Association of International Aromatherapists (NAHA) has felt it necessary to post a position statement on their website due to adverse events caused by perhaps well-meaning sellers of essential oils who know little to nothing about safely using essential oils. Here is NAHA's statement:

NAHA Safety Note for Peppermint Essential Oil:

- Avoid use on children under 30 months of age. The nasal mucosa is an autonomic reflexogen organ, which has a distance action to the heart, lungs and circulation and may lead to sudden apnoea and glottal constriction.

- Direct application of peppermint oil to the nasal area or chest to infants should be avoided because of the risk of apnea, laryngeal and bronchial spasms, acute respiratory distress with cyanosis and respiratory arrest. (The Longwood Herbal Task Force)

- Do not apply undiluted peppermint essential oils to the feet, particularly on infants and children under the age of 12.

- Inhalation of larges doses of menthol may lead to dizziness, confusion, muscle weakness, nausea and double vision. (Natural Standard Research Collaboration, Peppermint oil. Evidence based monograph 2005; Medlineplus)

The information below has been taken from the European Medicines Agency: ASSESSMENT REPORT ON MENTHA X PIPERITA L., AETHEROLEUM

- When used orally, it may cause heartburn, perianal burning, blurred vision, nausea and vomiting. Heartburn is related with the release of the oil in the upper GI tract, which relaxes the lower oesophageal sphincter, facilitating the reflux. The same occurs in the cases of hiatal hernia. This particular undesirable effect is minimized by an appropriate pharmaceutical formulation. **Peppermint essential oil should always be in an enteric-coated tablet or capsule for internal use.

- People with gallbladder disease, severe liver damage, gallstones and chronic heartburn should avoid the intake of peppermint oil.

- Menthol and peppermint oil caused burning mouth syndrome, recurrent oral ulceration or a lichenoid reaction, by contact sensitivity in the intra-oral mucosa, in sensitive patients.

- When applied on the skin, it may cause allergic reactions, as skin rashes, contact dermatitis and eye irritation.

- Use in infants or children is not recommended, when inhaled, taken by mouth or if applied on open skin areas, on the face or chest, due to the potential toxicity of the product.

- Peppermint oil should be used with caution. Doses of menthol over 1 g/Kg b.w. may be deadly.

For further research articles see:

A near fatal case of high dose peppermint oil ingestion- Lessons learnt

Acute allergic contact dermatitis of the lips from peppermint oil in a lip balm.

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