Herb

Bai Shao

Name: Bai Shao Herb
Brand: Me & Qi
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White peony root | 白芍

Also known as:

Shao Yao , Bai Shao Yao , Chinese peony , Common garden peony

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Herb

Bai Shao

White peony root | 白芍

Also known as:

Shao Yao , Bai Shao Yao , Chinese peony , Common garden peony

Properties

Blood-tonifying herbs (补血药) · Slightly Cool

Traditionally supports*

Menstrual Health Pain Management Liver 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

White peony root is one of the most widely used herbs in Chinese medicine, prized for nourishing Blood, easing pain, and calming the Liver. It is especially valued in women's health for menstrual irregularities, cramps, and hormonal balance. Its gentle, cooling nature also makes it helpful for headaches, muscle spasms, and excessive sweating.

Herb Category

Blood-tonifying herbs (补血药)

Main Actions

Nourishes Blood and regulates menstruation
Astringes Yin and stops sweating
Softens the Liver and alleviates pain
Calms the Liver and Subdues Yang

How These Actions Work

'Nourishes Blood and regulates menstruation' means Bai Shao replenishes the Liver's Blood stores. The Liver stores Blood and governs the smooth flow of menstruation. When Liver Blood is deficient, a person may experience a pale or sallow complexion, dizziness, scanty periods, or irregular cycles. Bai Shao's sour taste directs it into the Liver, where it nourishes and enriches Blood. This is why it appears in many gynaecological formulas and is sometimes called a 'key herb for regulating menstruation.'

'Astringes Yin and stops sweating' means Bai Shao's sour, astringing nature helps hold Yin fluids in place. When Yin is deficient, fluids can leak out as spontaneous sweating during the day or night sweats during sleep. Bai Shao collects and preserves these fluids. It is often paired with Gui Zhi (cinnamon twig) to harmonize the body's surface defences, or with Long Gu (dragon bone) and Mu Li (oyster shell) for night sweats from Yin Deficiency.

'Softens the Liver and alleviates pain' is one of Bai Shao's most valued actions. In TCM, when the Liver loses its flexibility, it can cause cramping, spasms, or pain along the flanks, abdomen, or limbs. Bai Shao nourishes Liver Blood so the Liver becomes 'soft' and pliable again, and its sour taste has a natural relaxing effect on tense muscles and sinews. The classic pairing is Bai Shao with Gan Cao (licorice root) in the formula Shao Yao Gan Cao Tang, used for muscle cramps and abdominal pain.

'Calms and suppresses Liver Yang' means that when raw Bai Shao is used, its slightly cool nature and Yin-nourishing quality can anchor excessive Liver Yang that rises upward. Liver Yang rising manifests as headaches, dizziness, irritability, or ringing in the ears. By enriching Liver Yin from below, Bai Shao prevents Yang from flaring up. It is often combined with herbs like Gou Teng (uncaria) and Ju Hua (chrysanthemum) for this purpose.

Patterns Addressed

In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Bai Shao 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 Shao addresses this pattern

Bai Shao is one of the primary herbs for Liver Blood Deficiency. Its sour taste enters the Liver channel directly, and its Blood-nourishing action replenishes the depleted Blood stores that the Liver depends on. The Liver governs the sinews, opens into the eyes, and controls menstruation. When Liver Blood is insufficient, all these functions suffer. Bai Shao's slightly cool temperature also prevents the 'empty Heat' that often accompanies Blood Deficiency. In classical formulas like Si Wu Tang (Four Substances Decoction), Bai Shao serves as the astringing, Yin-preserving counterpart to the more active, moving herbs like Dang Gui and Chuan Xiong.

A practitioner would look for one or more of these signs

Dizziness

Dizziness from Blood insufficiency

Irregular Menstruation

Scanty or delayed periods

Dull Pale Complexion

Pale or sallow face, pale lips and nails

Blurry Vision

Blurred vision or dry eyes

Why Bai Shao addresses this pattern

Although Bai Shao does not directly move Qi the way Chai Hu does, it plays a critical supporting role in Liver Qi Stagnation. The classical teaching is that the Liver's 'body is Yin but its function is Yang' (肝体阴而用阳). When Liver Blood and Yin are insufficient, the Liver loses its suppleness, and Qi stagnates more easily. Bai Shao softens and nourishes the Liver's Yin substance so that Qi can flow smoothly again. This is why Bai Shao is almost always paired with Chai Hu in formulas like Xiao Yao San: Chai Hu provides the outward movement to release stagnation, while Bai Shao prevents Chai Hu's dispersing nature from depleting Liver Yin.

A practitioner would look for one or more of these signs

Hypochondriac Pain

Pain or distension along the ribs and flanks

Irritability

Irritability and emotional tension

Irregular Menstruation

Premenstrual breast tenderness and irregular periods

Abdominal Pain

Abdominal cramping that worsens with stress

Why Bai Shao addresses this pattern

Liver Yang Rising occurs when Liver Yin and Blood can no longer anchor the Yang, which flares upward causing headaches, dizziness, and irritability. Bai Shao addresses the root of this pattern by nourishing Liver Yin and Blood from below. Its slightly cool temperature and sour-astringent nature draw Yang downward and inward. Used raw (Sheng Bai Shao), it is particularly effective at restraining ascending Liver Yang. It is often combined with calming, descending herbs like Gou Teng (uncaria), Shi Jue Ming (abalone shell), and Ju Hua (chrysanthemum) for hypertension-type headaches and dizziness.

A practitioner would look for one or more of these signs

Headaches

Headaches with a throbbing or rising sensation

Dizziness

Dizziness and vertigo

Tinnitus

Ringing in the ears

Hypertension

High blood pressure with flushed face

Why Bai Shao addresses this pattern

When the Liver overacts on the Spleen (a common consequence of emotional stress), the Spleen's digestive function is impaired, leading to abdominal pain, diarrhoea, and poor appetite alongside Liver symptoms like irritability and flank pain. Bai Shao softens the Liver to stop it from invading the Spleen, while its bitter taste can also help dry Dampness and strengthen the Spleen. Its muscle-relaxing, pain-relieving quality directly addresses the abdominal cramping that characterises this pattern. This is the mechanism behind its use in formulas such as Tong Xie Yao Fang (Important Formula for Painful Diarrhoea).

A practitioner would look for one or more of these signs

Abdominal Pain

Cramping abdominal pain relieved by bowel movement

Diarrhea

Loose stools triggered by emotional stress

Post-Surgical Constipation And Bloating

Abdominal bloating and poor appetite

TCM Properties

Temperature

Slightly Cool

Taste

Bitter (苦 kǔ), Sour (酸 suān)

Channels Entered

Liver Spleen

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 Shao roots are thick, straight, and uniform in size, with a smooth, clean surface that is whitish or pale pinkish-white in colour. The root should feel firm, heavy, and solid, and should not break easily. On cross-section, the cut surface should be relatively flat, whitish or slightly pinkish, with a clearly visible formation layer ring and distinct radial lines (ray pattern). The smell should be faint, and the taste slightly bitter and sour. Hang Bai Shao (from Zhejiang) tends to have a somewhat brownish surface but is considered the highest quality due to its rich content and dense texture. Avoid roots that are thin, crooked, loose-textured, low in starch (powdery quality), dark in colour, or that show unclear radial lines on the cross-section, as these indicate inferior quality.

Primary Growing Regions

The finest quality Bai Shao comes from Zhejiang province (especially Hangzhou, Jinhua, and surrounding areas), where it is known as Hang Bai Shao (杭白芍). It is one of the famous "Eight Zhejiang Herbs" (浙八味). Zhejiang's climate and soil conditions produce roots with superior texture and higher paeoniflorin content. Anhui province (especially Bozhou city) produces Bo Bai Shao (亳白芍), which accounts for the largest share of total production nationally. However, quality is considered somewhat lower than Hang Bai Shao due to mass cultivation practices. Sichuan province produces Chuan Bai Shao (川白芍, also called Zhongjiang Shao), which is another significant commercial variety. Other producing regions include Shandong (Heze), Hunan, Hubei, Guizhou, and Gansu, though in smaller quantities and generally lower quality.

Harvesting Season

Summer to autumn (typically June to September), after 4-5 years of cultivation.

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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Traditional Dosage Reference

Standard

6-15g

Maximum

Up to 30-60g in specific clinical contexts (such as severe muscle cramping or spasm), under practitioner supervision. Large doses may cause loose stools.

Notes

Lower doses (6-10g): used when Bai Shao serves a supporting role to nourish Blood and soften the Liver within a larger formula, or to harmonise the nutritive level with Gui Zhi. Standard doses (10-15g): appropriate for most clinical applications including menstrual regulation, Liver Qi constraint with pain, calming Liver Yang, and restraining Yin for spontaneous sweating. Higher doses (15-30g): used for more significant pain relief, especially for abdominal cramping, muscle spasm, or severe Liver Yang rising. In Shao Yao Gan Cao Tang for acute muscle cramps, classical usage often calls for larger doses. Dry-fried Bai Shao (chao Bai Shao) is milder and preferred for patients with weak Spleen and Stomach or loose stools. Wine-processed Bai Shao (jiu Bai Shao) enhances its Blood-moving and pain-relieving actions and is used more for menstrual pain.

Processing Methods

Processing method

Dry-fried: white peony root slices are stir-fried over gentle heat until lightly yellowed on the surface.

How it changes properties

Reduces the slightly cool temperature towards neutral. Diminishes its raw coldness while enhancing its ability to nourish Blood, harmonise the collaterals, moderate the Spleen, and relieve pain. The astringing quality is preserved but the risk of aggravating Spleen Cold is reduced.

When to use this form

Preferred when treating Spleen-Liver disharmony with diarrhoea and abdominal pain, or when the patient has a weak Spleen that cannot tolerate the raw herb's coolness. Also the standard choice when the primary goal is Blood nourishment and Yin astringing rather than Liver Yang suppression.

Toxicity Classification

Non-toxic

Bai Shao is classified as non-toxic in the Chinese Pharmacopoeia and has a long history of safe clinical use at standard dosages. Its primary active compound, paeoniflorin, has demonstrated low toxicity in pharmacological studies. The Total Glucosides of Paeony (TGP) extract, used as a pharmaceutical product in China, has been evaluated in multiple clinical trials with a favourable safety profile. Common mild side effects at higher doses include loose stools and mild gastrointestinal discomfort, which typically resolve with dose reduction. No significant organ toxicity has been reported at therapeutic doses.

Contraindications

Caution

Interior Cold patterns with Yang deficiency (such as chronic diarrhea from Spleen-Yang deficiency, cold abdominal pain, or persistent chills). Bai Shao is bitter, sour, and slightly cold in nature, which can worsen Cold conditions. As the classical text Ben Cao Jing Shu warns: it should be avoided in cases of cold in the middle burner with abdominal pain or diarrhea.

Avoid

Must not be used with Li Lu (Veratrum, 藜芦). This is one of the classical Eighteen Incompatibilities (十八反): all Shao Yao (both Bai Shao and Chi Shao) are listed as incompatible with Li Lu. This is recorded in the Chinese Pharmacopoeia.

Caution

Caution in patients with significant Blood stasis requiring vigorous Blood-moving treatment. Bai Shao is astringent and consolidating in nature (it restrains Yin and gathers), which may retain stagnation. It is not suited as a primary herb when strong dispersal of Blood stasis is needed.

Caution

Caution in postpartum women with Blood stasis and lochia retention. The astringent quality of Bai Shao can hinder the discharge of lochia. It should only be used in postpartum cases if there is clear Blood deficiency without significant stasis.

Caution

Caution in cases of exterior pathogen invasion that has not yet been resolved. Bai Shao's sour, astringent nature can trap exterior pathogens inside the body. It is used in Gui Zhi Tang for exterior patterns only because Gui Zhi provides the releasing action.

Classical Incompatibilities

Bai Shao is listed in the Eighteen Incompatibilities (十八反): Shao Yao (both Bai Shao and Chi Shao) is incompatible with Li Lu (藜芦, Veratrum). The classical formula states: "诸参辛芍叛藜芦" (all Shen herbs, Xi Xin, and Shao Yao rebel against Li Lu). This is recorded in the Chinese Pharmacopoeia, which states that Bai Shao should not be used together with Li Lu. Additionally, the Ben Cao Jing Ji Zhu notes older compatibilities: "恶石斛、芒消。畏消石、鳖甲、小蓟。" (Bai Shao is averse to Shi Hu and Mang Xiao; it fears Xiao Shi, Bie Jia, and Xiao Ji). These are less strictly observed in modern practice than the Eighteen Incompatibilities.

Special Populations

Pregnancy

Generally considered safe at standard doses during pregnancy, and Bai Shao appears in many classical formulas used for pregnancy-related conditions (e.g. Dang Gui Shao Yao San for abdominal pain during pregnancy). However, its cold nature and Blood-moving properties in the Shen Nong Ben Cao Jing description ("breaks up hard masses, eliminates Blood Impediment") mean that high doses should be avoided, particularly in the first trimester or in women with a history of miscarriage. Use during pregnancy should be under practitioner guidance with appropriate warming herbs to balance its cool nature.

Breastfeeding

No specific concerns have been documented for Bai Shao during breastfeeding. It is included in many classical postpartum formulas for nourishing Blood and alleviating pain. Its slightly cold nature should be considered: women who are breastfeeding and have weak digestion or loose stools may benefit from using the dry-fried form (chao Bai Shao) to reduce the cooling effect. Standard dosages are generally considered safe.

Pediatric Use

Bai Shao may be used in children at reduced dosages appropriate for age and body weight, typically one-third to one-half of the adult dose. It is commonly included in pediatric formulas for abdominal pain and cramping. Its slightly cold nature means it should be used cautiously in children with weak digestion or chronic loose stools. The dry-fried form (chao Bai Shao) is preferred for pediatric use as it is gentler on the digestive system.

Drug Interactions

Anticoagulant and antiplatelet medications: Bai Shao contains compounds (catechin, ethyl gallate) with demonstrated antiplatelet aggregation and antithrombotic properties. Concurrent use with warfarin, heparin, aspirin, or clopidogrel may theoretically increase bleeding risk. Patients on anticoagulant therapy should inform their prescriber if taking Bai Shao-containing formulas.

Immunosuppressant medications: Total Glucosides of Paeony (TGP) have documented immunomodulatory effects and are clinically used alongside methotrexate and hydroxychloroquine for autoimmune diseases. While TGP has been shown to reduce some side effects of these drugs (particularly hepatotoxicity of methotrexate), combined use should be monitored by qualified practitioners, as TGP may alter the overall immunological effect.

Hepatically metabolised drugs: Paeoniflorin has been shown in preclinical studies to interact with cytochrome P450 enzymes, notably CYP2E1. This raises a theoretical concern about altered metabolism of drugs processed through these liver enzyme pathways. Clinical significance in humans remains to be fully established.

Dietary Advice

When taking Bai Shao for Blood deficiency or Liver-related conditions, it is beneficial to include Blood-nourishing foods such as dark leafy greens, red dates, and lean meats. Avoid excessive consumption of cold, raw foods and icy drinks, which can impair the Spleen's ability to generate Blood and may worsen any loose stools that large doses of Bai Shao can cause. If using Bai Shao for Liver Yang rising or stress-related conditions, reducing alcohol, caffeine, and overly spicy or greasy foods is advisable, as these can aggravate Liver Heat.

Cautions & Warnings

Although this herb 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.