🏮Taoist Herbal Medicine

Fennel Seed (Xiao Hui Xiang)

Foeniculum vulgare

About Fennel Seed (Xiao Hui Xiang)

Fennel Seed (Xiao Hui Xiang) (Foeniculum vulgare) is a herb used in the Taoist Herbal Medicine tradition to help with Digestive Issues, Pain, Hernia, and Menstrual Issues, among 1 other condition it addresses. The seeds and aerial parts are the parts traditionally used, taken internally.

Botanical background

Fennel (Foeniculum vulgare) is a flowering plant species in the carrot family. It is a hardy, perennial herb with yellow flowers and feathery leaves. It is indigenous to the shores of the Mediterranean but has become widely naturalized in many parts of the world, especially on dry soils near the sea-coast and on riverbanks.

Source: Wikipedia, via iNaturalist

Parts used

Seeds · internalAerial Parts · internal
🫖

Decoction

1–2 cups daily
  • Add 1–2 tsp of dried Fennel Seed (Xiao Hui Xiang) to 2 cups of cold water.
  • Bring to a boil, then simmer for 15–20 minutes.
  • Strain and drink warm.
💧

Tincture

20–40 drops in water, 2–3× daily
  • Pack dried Fennel Seed (Xiao Hui Xiang) 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 Fennel Seed (Xiao Hui Xiang) into a fine powder.
  • Fill size 00 capsules or stir into smoothies or honey.
♨️

Steam Inhalation

1–2× daily during acute symptoms
  • Add 2–3 tbsp of Fennel Seed (Xiao Hui Xiang) to a bowl of just-boiled water.
  • Drape a towel over your head and inhale steam for 5–10 minutes.

Pregnancy, Breastfeeding & Children

Pregnancy

Use Caution

Fennel tea is widely used traditionally for digestion, but fennel has estrogenic and emmenagogue properties at concentrated/medicinal doses and is generally advised against in high amounts during pregnancy — occasional culinary/tea use is usually considered fine.

Breastfeeding

Likely Safe

One of the most traditionally used herbs to support milk supply and ease infant colic (via the nursing parent's tea); normal amounts are considered compatible with breastfeeding.

Children

Likely Safe

Widely used in dilute tea form for infant colic and gas (a classic gripe-water ingredient); keep to mild, age-appropriate preparations.

As a member of the Apiaceae (carrot/celery) family, this herb is a known cross-reactivity group with birch pollen ("oral allergy syndrome") — use caution with a birch pollen or celery allergy.

Contraindications

    Warnings

    ⚠️ 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

    Ciprofloxacin and other antibiotics

    May reduce absorption — separate dosing by at least 2 hours.

    Hormone-sensitive conditions

    Mild phytoestrogenic activity.

    Where to find in nature

    Native region

    Various global regions

    Climate

    Varied

    Habitat

    Cultivated in traditional medicinal gardens, botanical gardens, and herb farms worldwide

    🌿 To see Fennel Seed (Xiao Hui Xiang) 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

    • Health food stores (Whole Foods, Natural Grocers, Holland & Barrett, GNC)
    • Naturopathic clinics and integrative medicine practices
    • Specialist herbal apothecaries and herbalist practices
    • Farmers markets with herb vendors

    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 Fennel Seed (Xiao Hui Xiang), 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.