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cooling

Peppermint

Mentha piperita

薄荷

Pinyin: Bò Hé

🌿

Plant Family

Lamiaceae (Labiatae)

Part Used

Aerial parts (leaves and stems), essential oil

Origin

Native to Europe and Middle East; now cultivated worldwide. China is a major producer.

Safety Level

Safe

Overview

Peppermint is a hybrid mint (cross between watermint and spearmint) that grows wild in moist areas. It has square stems, opposite leaves, and purple flower spikes. Peppermint is one of the oldest and most widely used medicinal herbs, valued for its cooling, refreshing, and digestive properties. Both Western herbalism and Traditional Chinese Medicine use mint extensively.

Traditional Chinese Medicine Properties

Nature (四气)

cool

Flavors (五味)

acrid / pungent

Meridians (归经)

lung, liver

Health Benefits

✓ Soothes digestive discomfort (IBS, indigestion, gas)
✓ Relieves tension headaches and migraines
✓ Opens nasal passages and supports respiratory health
✓ Cooling and refreshing - reduces fever
✓ May help with nausea and morning sickness
✓ Improves mental clarity and focus
✓ Oral health and fresh breath
✓ May help with stress and tension

Traditional Uses

  • Disperses wind-heat - for early stage colds, headache, red eyes
  • Clears the head and benefits the throat and eyes
  • Soothes liver qi stagnation - for emotional constraint
  • Promotes eruption of rashes (early stage measles)
  • Aromatic transformer - for dampness and summer heat
  • Abdominal pain and bloating

Active Constituents

The key compounds responsible for this herb's therapeutic effects:

Menthol (35-50% of essential oil) - primary activeMenthone and menthyl acetateEssential oil components (1,8-cineole, limonene)Flavonoids (luteolin, eriocitrin, hesperidin)Rosmarinic acidTanninsVitamins A and CMinerals (manganese, copper, potassium)

Usage & Dosage

How to Use

Used as tea, tincture, capsules, essential oil (topical and aromatherapy), and in cooking. The essential oil is one of the most popular and versatile essential oils. Fresh or dried leaves make a refreshing tea.

Suggested Dosage

Tea: 1-2 tsp dried leaves (2-5g) steeped 5-10 min, covered. Essential oil: 2-3 drops in diffuser, or diluted for topical use. Capsules: 200-400mg of enteric-coated oil (for IBS).

Quality & Storage

Harvest Season

Summer, just before or at the beginning of flowering. Leaves are harvested in the morning after dew has dried and dried at low temperature.

Quality Indicators

Bright green leaves with strong minty aroma. High menthol content (35-50%). Dark color indicates poor quality. Organic is preferred to avoid pesticide residue.

Storage

Store dried leaves in airtight container in cool, dark place. Essential oil should be stored in dark glass bottle, away from heat. Shelf life: 1-2 years for dried herb, 2-3 years for essential oil.

Safety Information

Contraindications

GERD / acid reflux (may relax lower esophageal sphincter)Children under 6 (risk of glottal spasm with essential oil near face)Severe liver diseaseGallbladder inflammation or gallstonesPregnancy (large doses - tea in moderation is generally fine)Breastfeeding (may reduce milk supply in some)

Possible Side Effects

  • Generally safe when used as tea or food flavoring
  • Heartburn or acid reflux in susceptible individuals
  • Skin irritation (essential oil undiluted)
  • Headache (in sensitive individuals or excessive use)
  • Allergic reaction (rare)

Drug Interactions

  • Cyclosporine (may increase levels)
  • Diabetes medications (may lower blood sugar)
  • Blood pressure medications
  • Sedatives (may enhance effect)
  • Iron supplements (tannins may reduce absorption - separate doses)

Note: Always consult with a qualified healthcare practitioner before starting any herbal supplement, especially if you are pregnant, nursing, have medical conditions, or take medications.

References & Research

Information on this page is based on traditional herbal knowledge and modern scientific research. For a comprehensive list of references, please refer to our full citations page.

ℹ️ Disclaimer

This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. The FDA has not evaluated these statements. Always consult a qualified healthcare provider before using herbal supplements.

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