☯️Traditional Chinese Medicine

Mugwort (Ai Cao)

Artemisia vulgaris

About Mugwort (Ai Cao)

Mugwort (Ai Cao) (Artemisia vulgaris) is a herb used in the Traditional Chinese Medicine tradition to help with Menopause, Pain, Circulation, and Immune Support, among 1 other condition it addresses. The aerial parts and leaves are the parts traditionally used, taken internally.

Botanical background

Artemisia vulgaris (common mugwort or common wormwood) is one of several species in the genus Artemisia commonly known as mugwort, although Artemisia vulgaris is the species most often called mugwort. This species is also occasionally known as riverside wormwood, felon herb, chrysanthemum weed, wild wormwood, old Uncle Henry, sailor's tobacco, naughty man, old man or St. John's plant (not to be confused with St John's wort). Mugworts have been used medicinally and as culinary herbs.

Source: Wikipedia, via iNaturalist

Parts used

Aerial Parts · internalLeaves · internal
🍵

Tea / Infusion

1–3 cups daily
  • Steep 1–2 tsp of dried Mugwort (Ai Cao) in freshly boiled water for 5–10 minutes.
  • Cover while steeping.
  • Strain and drink.
💧

Tincture

20–40 drops in water, 2–3× daily
  • Pack dried Mugwort (Ai Cao) into a jar and cover with 40–60% alcohol.
  • Seal and steep for 4–6 weeks, shaking daily.
  • Strain and store in a dark dropper bottle.
💊

Powder / Capsule

500 mg – 1 g, 1–3× daily
  • Grind dried Mugwort (Ai Cao) into a fine powder.
  • Fill size 00 capsules or stir into smoothies or honey.

Pregnancy, Breastfeeding & Children

Pregnancy

Avoid

Mugwort is contraindicated in pregnancy — it's a documented emmenagogue/abortifacient and contains thujone.

Breastfeeding

Avoid

Contraindicated during breastfeeding due to thujone content and uterine-stimulant reputation.

Children

Avoid

Contraindicated in children due to thujone content.

As a member of the Asteraceae (ragweed/daisy) family, this herb carries a real chance of cross-reaction in anyone allergic to ragweed, chrysanthemums, marigolds, or daisies — introduce cautiously if there's a known allergy.

Contraindications

  • Autoimmune conditions (lupus, MS, RA) — may overstimulate immune response
  • Pre-surgery — discontinue at least 2 weeks prior (potential antiplatelet effect)
  • Hormone-sensitive conditions (breast/ovarian cancer, endometriosis) — phytoestrogenic activity possible

Warnings

Heart & Blood Pressure Medications

May interact with antihypertensive drugs, blood thinners, or cardiac medications. Do not combine without medical guidance.

⚠️ Allergic Reactions

Discontinue immediately if you experience rash, itching, swelling, or difficulty breathing.

⚠️ Not Medical Advice

This information is for educational purposes only. Always consult a qualified healthcare provider before using herbal remedies.

Drug & herb interactions

May affect hormone levels

Watch for: Hormone therapies, oral contraceptives, and tamoxifen or similar medications

Some herbs have mild phytoestrogenic or hormone-modulating activity that can interact with hormonal medications.

May thin the blood

Watch for: Anticoagulants (warfarin), antiplatelets (aspirin, clopidogrel), and other blood-thinning herbs or supplements (ginkgo, garlic, fish oil, vitamin E)

Combining blood-thinning substances can increase bleeding risk, including before surgery or dental work.

May affect immune activity

Watch for: Immunosuppressants (for transplant or autoimmune conditions)

Immune-stimulating herbs can work against immunosuppressive therapy.

Where to find in nature

Native region

China, Taiwan, Korea, Japan

Climate

Temperate to subtropical

Habitat

Mountain forests, river valleys, and cultivated herb farms throughout East Asia

🌿 To see Mugwort (Ai Cao) growing, visit botanical gardens, university plant collections, or specialist herb nurseries near you. If foraging in the wild, always work with an expert identifier — never consume a plant you are not 100% certain of.

Where to buy

In store

  • Chinese herbal medicine shops and TCM clinics
  • Chinatown herbal stores and Asian supermarkets with herbal sections
  • Health food stores (Whole Foods, Natural Grocers, Holland & Barrett, GNC)
  • Naturopathic clinics and integrative medicine practices
  • Specialist herbal apothecaries and herbalist practices

Online

iHerb

Wide selection of standardised extracts, capsules, and powders with lab testing

Mountain Rose Herbs

Premium bulk dried herbs — certified organic, ethically sourced

Starwest Botanicals

Large selection of certified organic bulk herbs and powders

Herb Pharm

High-quality liquid extracts and tinctures, rigorous quality standards

Amazon

Convenient — verify brand certifications and check third-party testing

Etsy

Small-batch artisan herbalists, hand-harvested and wildcrafted herbs

Quality tips

When buying Mugwort (Ai Cao), look for: certified organic labelling, clearly stated country of origin, third-party lab testing for heavy metals and pesticides, and a batch expiry date. Standardised extracts offer consistent dosing; bulk dried herbs are more economical for regular use. Avoid very cheap, unlabelled products — quality varies enormously.