Herb

Bai Zhi

Angelica root | 白芷

Also known as:

Dahurian Angelica Root

Bai Zhi

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Properties

Warm, acrid herbs that release the Exterior (辛温解表药) · Warm

Traditionally supports*

Sinus and Nasal Health Headache and Facial Pain Skin Health Women's Health

Parts Used

Root (根 gēn)

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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About This Herb

Traditional Chinese Medicine background and properties

Herb Description

Bái Zhǐ is a fragrant, warming herb widely used for sinus congestion, frontal headaches, and toothaches. It is one of Chinese medicine's go-to remedies for pain in the face and forehead, nasal problems, and early-stage skin infections. It also helps with excessive vaginal discharge caused by internal dampness.

Herb Category

Warm, acrid herbs that release the Exterior (辛温解表药) Exterior-releasing herbs (解表药)

Main Actions

  • Releases the Exterior and Disperses Wind-Cold
  • Dispels Wind and Stops Pain
  • Unblocks the Nasal Passages
  • Secures the Kidneys and Stops Vaginal Discharge
  • Expels Pus and Reduces Swelling

How These Actions Work

'Releases the exterior and disperses Cold' means Bái Zhǐ helps the body push out a Wind-Cold invasion (the early stage of a cold with chills, body aches, and clear nasal discharge). Its warm, pungent nature gently promotes sweating to expel the pathogen from the body's surface. It is most useful when a cold presents with pronounced headache and nasal congestion.

'Dispels Wind and alleviates pain' is the action Bái Zhǐ is most famous for. It has a strong affinity for the Yáng Míng channel (Stomach meridian), which runs across the forehead, cheeks, and gums. This is why it is considered the lead herb for frontal headaches, supraorbital pain (pain along the brow ridge), and toothaches. It can also address pain from Wind-Damp obstruction in the joints.

'Opens the nasal passages' refers to its aromatic, penetrating nature that clears nasal congestion and sinus blockage. It is a key herb for chronic sinusitis (called 'deep-source nasal congestion' in TCM), often combined with Xīn Yí (magnolia flower) and Cāng Ěr Zǐ (xanthium fruit).

'Dries Dampness and stops vaginal discharge' means Bái Zhǐ can address excessive vaginal discharge caused by Dampness accumulating in the lower body. Its warm, drying nature is best suited for white, thin discharge from Cold-Damp, though it can be combined with Cold-natured herbs like Huáng Bǎi to treat Damp-Heat discharge as well.

'Reduces swelling and expels pus' describes Bái Zhǐ's use in the early stages of skin abscesses, boils, and other inflammatory swellings. Before pus has formed, it can help disperse the swelling. After pus has formed, it helps promote drainage. This makes it a common supporting herb in surgical (external medicine) formulas.

Patterns Addressed

In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Bai Zhi is traditionally associated with these specific patterns.

The following describes this herb's classification within Traditional Chinese Medicine theory and is provided for educational purposes only.

Why Bai Zhi addresses this pattern

When Wind-Cold invades the body's surface, it blocks the flow of Qi in the channels and causes headache, body aches, chills, and nasal congestion. Bái Zhǐ's warm, pungent nature directly disperses Cold from the exterior and releases the surface. Its particular affinity for the Yáng Míng (Stomach) channel means it excels at addressing the frontal headache and nasal symptoms that often accompany this pattern. Its aromatic quality also opens congested nasal passages, making it especially indicated when nasal obstruction is prominent.

A practitioner would look for one or more of these signs

Headaches

Frontal headache or supraorbital (brow ridge) pain

Nasal Congestion

Blocked nose with clear or white discharge

Common Cold

Chills, body aches, and aversion to cold

TCM Properties

Temperature

Warm

Taste

Acrid / Pungent (辛 xīn)

Channels Entered
Lungs Stomach Large Intestine
Parts Used

Root (根 gēn)

This is partial information on the herb's TCM properties. More detailed information is available on the herb's dedicated page

Product Details

Manufacturing, supplier, and product specifications

Product Type

Granules

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Botanical & Sourcing

Quality Indicators

Good quality Bai Zhi root is conical, 10-25 cm long and 1.5-2.5 cm in diameter, firm and solid (not hollow or spongy). The outer surface should be greyish-brown to yellowish-brown with clear longitudinal wrinkles and visible horizontal lenticel-like projections, sometimes arranged in four vertical rows. The root head is bluntly four-angled. The cross-section should be white to greyish-white with a starchy (powdery) texture, showing a brown-colored cambium ring (near-square or near-round in shape) and numerous small brown oil dots scattered through the cortex. The aroma should be distinctly fragrant and aromatic. The taste is acrid with slight bitterness. Avoid roots that are hollow, dark, soft, moldy, or worm-eaten. Material with strong aroma and high starch content is preferred.

Primary Growing Regions

Bai Zhi has four major terroir (道地药材) production regions in China, each yielding a named variety: - Hang Bai Zhi (杭白芷): Zhejiang province, especially Hangzhou, Yuyao, and Linhai. One of the "Eight Famous Zhejiang Herbs" (浙八味). - Chuan Bai Zhi (川白芷): Sichuan province, especially Suining, Mianyang, and Daxian. Historically one of the most prized varieties. - Yu Bai Zhi (禹白芷): Henan province, especially Yuzhou (Yuzhou/Yuxian) and Changge. - Qi Bai Zhi (祁白芷): Hebei province, especially Anguo (historically known as Qizhou). One of the "Eight Famous Qi Herbs" (八大祁药). All four are recognized premium producing regions. Wild Angelica dahurica also occurs in eastern Siberia, Korea, Japan, and Mongolia.

Harvesting Season

Summer to autumn (July to October), when the stem and leaves begin to yellow. Autumn-sown crops are harvested the following July to September; spring-sown crops are harvested in October of the same year.

Supplier Information

Treasure of the East

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Miscellaneous Info

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Usage & Safety

How to use this herb and important safety information

Important Medical Disclaimer

The information provided here is for educational purposes only and is not intended as medical advice or to replace consultation with a qualified healthcare professional. This herb is a dietary supplement and has not been evaluated by the FDA. It is not intended to diagnose, treat, cure, or prevent any disease.

Always consult with a qualified healthcare provider, particularly if you are pregnant, nursing, have a medical condition, or are taking other medications. Discontinue use and consult your healthcare provider if you experience any adverse reactions.

Recommended Dosage

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Instructions for safe storage and consumption

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Traditional Dosage Reference

Standard

3-9g

Maximum

Up to 10-15g in acute conditions such as severe sinusitis or headache, under practitioner supervision. Standard texts generally cap the range at 9-10g for decoction.

Notes

Use lower doses (3-5g) when Bai Zhi is included as a supporting herb for mild nasal congestion or as a pain-relieving assistant in a multi-herb formula. Use moderate doses (6-9g) for its primary indications: headache (especially frontal/supraorbital), sinusitis, toothache, or vaginal discharge due to cold-dampness. For external application (ground into powder for poultices or mixed into ointments), dosage is adjusted to the affected area. Because Bai Zhi is warm and drying, prolonged use or excessive doses in people without genuine cold or dampness patterns may cause dryness of the mouth, throat, or skin. When used for Yangming-channel headache, it is often paired with Chuan Xiong to enhance the analgesic effect.

Processing Methods

Processing method

Dry-fried over a gentle flame (文火) until the surface turns slightly yellow.

How it changes properties

Reduces the herb's pungent, drying nature while enhancing its pain-relieving effect. The warmth becomes milder, making it gentler on the Stomach. The overall dispersing power is slightly reduced.

When to use this form

Preferred when using Bái Zhǐ primarily for pain relief (headache, toothache) rather than for releasing the exterior, especially in patients with a sensitive stomach. Also preferred for treating Cold-Damp vaginal discharge.

Toxicity Classification

Non-toxic

The Ming Yi Bie Lu (《名医别录》) explicitly classifies Bai Zhi as non-toxic (无毒), and this is the standard classification used by the Chinese Pharmacopoeia. However, one historical source (《药物图考》) described it as slightly toxic (有小毒). The primary safety concern relates to its furanocoumarin content, including imperatorin, bergapten, isoimperatorin, and xanthotoxin. These compounds are photosensitizing agents: they can cause phototoxic skin reactions (redness, blistering, hyperpigmentation) when the skin is exposed to ultraviolet light during or after ingestion. The root also contains trace amounts of angelicotoxin, a neurotoxic compound that is present in very small quantities in properly harvested and processed root material. At standard therapeutic doses (3-9g in decoction), Bai Zhi has an excellent safety profile. Excessive or prolonged use may cause dryness or gastrointestinal upset. People taking Bai Zhi should avoid prolonged sun exposure.

Contraindications

Caution

Yin deficiency with Blood-Heat (阴虚血热): Bai Zhi is warm, acrid, and drying. In people with underlying Yin deficiency or internal Heat in the Blood, it can worsen dryness, agitate Heat, and intensify symptoms like hot flushes, night sweats, or bleeding.

Caution

Vomiting caused by Fire or Stomach Heat: Classical texts (Ben Cao Jing Shu) explicitly warn against using Bai Zhi when vomiting is due to internal Fire rather than cold, as its warm nature would aggravate the condition.

Caution

Abnormal vaginal bleeding (leukorrhea/metrorrhagia) due to Yin deficiency with vigorous Fire: When abnormal discharge or bleeding stems from deficiency-Heat rather than cold-dampness, Bai Zhi's warm, drying properties are inappropriate and may worsen the condition.

Caution

Abscesses or sores that have already ulcerated: Once a boil or abscess has ruptured and is draining, Bai Zhi should be gradually reduced or discontinued. Its pus-expelling action is most appropriate before or during the initial stage of suppuration.

Caution

Known photosensitivity or concurrent photosensitizing medication: Bai Zhi contains furanocoumarins (imperatorin, bergapten, etc.) that increase skin sensitivity to ultraviolet light. People with photosensitive skin conditions or those taking photosensitizing drugs should avoid Bai Zhi or minimize sun exposure while using it.

Avoid

Known allergy to Bai Zhi or Apiaceae (Umbelliferae) family plants: Allergic reactions including skin rashes, swelling, and respiratory difficulty have been reported. People with known sensitivity should avoid this herb entirely.

Classical Incompatibilities

Bai Zhi does not appear on the classical Eighteen Incompatibilities (十八反) or Nineteen Mutual Fears (十九畏) lists. However, classical sources note that it "clashes with" (恶) Xuan Fu Hua (旋覆花, Inula flower), meaning the two may reduce each other's effectiveness. Dang Gui (当归) is traditionally considered its envoy herb (使药), meaning Dang Gui can guide and enhance Bai Zhi's therapeutic effects.

Special Populations

Pregnancy

Use with caution during pregnancy. Bai Zhi is acrid, warm, and has dispersing and drying properties. While it is not absolutely contraindicated in pregnancy, its wind-dispersing and Blood-moving qualities raise theoretical concerns about disturbing fetal Qi. Additionally, its furanocoumarin content (photosensitizing compounds) warrants caution. Classical sources do not list it as a prohibited pregnancy herb, and the Ri Hua Zi Ben Cao (《日华子本草》) even mentions it for preventing miscarriage (补胎漏滑落). However, at standard dosages it should only be used during pregnancy under the guidance of a qualified practitioner, and only when clearly indicated.

Breastfeeding

No specific classical or modern contraindications for breastfeeding have been established. Bai Zhi's aromatic, acrid compounds and furanocoumarins may theoretically transfer into breast milk in small amounts, though this has not been formally studied. Given the lack of safety data, use at standard doses only when clinically indicated, and monitor the infant for any signs of irritability, skin rash, or digestive upset. Discontinue if adverse effects are observed.

Pediatric Use

Bai Zhi may be used in children at reduced doses appropriate to age and body weight, generally one-third to one-half of the adult dose for children over 3 years old. It is commonly encountered in pediatric formulas for nasal congestion and sinusitis. Due to its warm, drying nature, it should be used with extra caution in children who tend to run warm or who have dry constitutions. Children's skin may be more sensitive to the photosensitizing furanocoumarins, so sun exposure should be limited during use. Not recommended for infants under 1 year without specialist guidance.

Drug Interactions

Anticoagulant and antiplatelet medications (e.g. warfarin, aspirin, clopidogrel): Bai Zhi's furanocoumarin compounds, particularly imperatorin and isoimperatorin, have demonstrated antiplatelet activity in preclinical studies. Concurrent use may theoretically increase bleeding risk. Monitor closely if co-administered.

Photosensitizing drugs (e.g. tetracyclines, fluoroquinolones, sulfonamides, amiodarone, certain NSAIDs): The furanocoumarins in Bai Zhi (bergapten, xanthotoxin, imperatorin) are known photosensitizers. Combining Bai Zhi with other photosensitizing medications could increase the risk of phototoxic reactions (severe sunburn, skin blistering). Advise strict sun protection.

CYP450 enzyme substrates: Furanocoumarins from Bai Zhi have been shown to inhibit certain cytochrome P450 enzymes (particularly CYP3A4) in preclinical studies. This could potentially increase plasma levels of drugs metabolized by these enzymes, including some statins, calcium channel blockers, and immunosuppressants. Clinical significance is not fully established but warrants awareness.

Dietary Advice

Avoid excessive consumption of cold, raw foods and iced beverages while taking Bai Zhi, as these may counteract its warm, dispersing properties. Since Bai Zhi contains photosensitizing furanocoumarins, it is advisable to minimize prolonged sun exposure and to avoid concurrent consumption of other strongly photosensitizing foods (such as large amounts of celery, parsley, or citrus peel). Classical sources note that Bai Zhi may be used in cooking (e.g. as a spice in braised meats and hotpot), and such culinary doses are generally safe.

Cautions & Warnings

Although this formula is typically safe for most individuals, it may cause side effects in some people. Pregnant women, nursing mothers, postpartum women, and those with liver disease should use the formula with caution.

As with any Chinese herbal remedy, it is advisable to seek guidance from a qualified TCM practitioner before beginning treatment.