Bái Zhú (白术) — White Atractylodes rhizome

Bái Zhú (Atractylodes macrocephala) is one of the most important Spleen Qi tonic herbs in Chinese medicine. Its principal actions — tonifying Spleen Qi, drying Dampness, stabilising the Exterior and calming the foetus — make it indispensable for digestive weakness, fatigue, fluid retention, PCOS, immune support and morning sickness. It appears in a remarkable proportion of classical formulas and is safe at standard doses in pregnancy.

On this page

1. What is Bai Zhu?
2. Properties
3. Actions and indications
4. Digestive support
5. Immune support
6. Fluid metabolism and oedema
7. Pregnancy safety and use
8. Key formulas
9. Modern research
10. Incompatibilities
11. Cautions and contraindications
12. Treatment at my clinic
13. Frequently asked questions about Bai Zhu

1. What is Bai Zhu?

Bái Zhú (白术) is the dried rhizome of Atractylodes macrocephala, a perennial plant in the Asteraceae family native to eastern China. Its English name is White Atractylodes rhizome — “Bai” means white, referring to the pale appearance of the cut rhizome, while “Zhu” is the genus name. The active compounds include atractylenolides (I, II and III), atractylon, atractylodin and Bai Zhu polysaccharides.

It belongs to the category of Qi tonics in the Chinese Materia Medica and is one of the most clinically important herbs in traditional Chinese medicine (TCM). It is distinct from Cang Zhu (Atractylodes lancea), the related but more aromatic and drying herb — the two are commonly confused but have different clinical applications. Bai Zhu is more tonifying and is the primary herb for deficient patterns; Cang Zhu is more drying and is used for excess Dampness.

I prescribe Bái Zhú as part of bespoke herbal formulas from pharmaceutical-grade granules sourced from Sun Ten in Taiwan. Herbs are always combined with other herbs selected to match the patient’s individual TCM pattern. Online consultations are available for patients who cannot attend my clinic in person.

2. Properties

3. Actions and indications

Principal actions

1. Tonifies the Spleen and augments Qi — for fatigue, poor appetite, loose stools and digestive weakness
2. Dries Dampness and promotes urination — for oedema, bloating, diarrhoea with dampness and phlegm-damp patterns
3. Consolidates the Exterior and stops sweating — at higher doses, similar to Huang Qi (astragalus)
4. Calms the foetus — one of the key pregnancy-safe tonic herbs, used for threatened miscarriage with Spleen Qi deficiency

Indications

1. Spleen Qi deficiency with Dampness — fatigue, poor appetite, bloating and loose stools
2. PCOS from Spleen deficiency generating Phlegm-Damp
3. Oedema and fluid retention
4. Spontaneous sweating from Wei Qi deficiency
5. Threatened miscarriage from Spleen Qi deficiency
6. Morning sickness in pregnancy from Spleen weakness
7. Functional dyspepsia, IBS and post-infectious gut dysfunction

4. Digestive support

Bai Zhu is the go-to herb for digestive weakness in TCM. It addresses the classic pattern of bloating after meals, loose stools or sluggish bowel, reduced appetite, fatigue after eating, food sensitivities and a tendency to accumulate fluid in the tissues — all the hallmarks of Spleen Qi deficiency with Dampness.

Modern research has confirmed Bai Zhu’s effects on gut function. It regulates gut motility (normalising both diarrhoea and constipation depending on the underlying imbalance), reduces intestinal inflammation, supports the intestinal mucosal barrier and modulates the gut microbiome. For patients with IBS, functional dyspepsia, post-infectious gut dysfunction or chronic loose stools, Bai Zhu is a key component of the recovery formula. The classical Liu Jun Zi Tang — with Bai Zhu as one of its six herbs — remains a foundation formula for digestive weakness more than a thousand years after it was first written down.

5. Immune support

Polysaccharides extracted from Bai Zhu have demonstrated immunomodulatory effects — enhancing T-cell and macrophage activity while reducing inflammatory cytokines. This dual action (strengthening without over-stimulating) mirrors its TCM classification as a tonic rather than a stimulant.

In the classical formula Yu Ping Feng San (Jade Windscreen Powder), Bai Zhu pairs with Huang Qi (astragalus) to strengthen Wei Qi — the defensive energy that prevents recurrent colds, allergies and respiratory infections. This is one of the most widely prescribed preventative formulas in TCM, used routinely through autumn and winter for patients with weak immunity.

6. Fluid metabolism and oedema

Bai Zhu is one of the most important herbs for addressing fluid retention — particularly the pitting oedema that reflects Spleen Qi deficiency with Dampness. It appears in Wu Ling San, the principal classical formula for fluid retention, alongside Fu Ling, Ze Xie, Zhu Ling and Gui Zhi.

It also features in formulas for PCOS where Phlegm-Dampness is a central pattern — the dampness that obstructs the ovaries and contributes to cystic morphology, irregular ovulation and weight gain. The Bai-Zhu-containing formulas address fluid metabolism at the level of the Spleen, which in TCM governs water transformation, rather than simply stimulating diuresis.

7. Pregnancy safety and use

Bai Zhu is one of the few dampness-drying herbs considered safe in pregnancy and is included in formulas for morning sickness, threatened miscarriage and pregnancy oedema. Its ability to strengthen the Spleen and resolve Dampness without moving Blood or stimulating the uterus makes it suitable where stronger herbs are contraindicated.

It features in Dang Gui Shao Yao San — a classical formula for pregnancy support where there is Spleen Qi deficiency with Blood deficiency — and in Bai Zhu San, the dedicated formula for nausea and vomiting in early pregnancy. As with all herbs in pregnancy, prescription should only be by a herbalist registered with the Register of Chinese Herbal Medicine (RCHM).

8. Key formulas containing Bái Zhú

Bai Zhu is one of the most frequently used herbs in classical Chinese herbal medicine, appearing in a remarkable proportion of formulas. Key examples include:

• Si Jun Zi Tang — the foundational Spleen Qi tonifying formula
• Liu Jun Zi Tang — Spleen Qi deficiency with Phlegm-Damp
• Yu Ping Feng San — Jade Windscreen, for Wei Qi deficiency and recurrent colds
• Wu Ling San — the principal formula for fluid retention and oedema
• Wan Dai Tang — for vaginal discharge from Spleen deficiency with Damp
• Shen Ling Bai Zhu San — Spleen Qi deficiency with chronic loose stools

See the full Chinese herbal medicine formula directory for detailed information on all classical formulas.

9. Modern research

Atractylodes macrocephala is one of the most extensively researched Spleen-tonifying herbs in TCM. Key bioactive constituents include atractylenolides, atractylon, atractylodin, polysaccharides and sesquiterpene lactones. Research confirms gastrointestinal motility-regulating effects (both stimulating and inhibiting depending on dose), immunomodulatory properties, anti-inflammatory effects and beneficial effects on the gut microbiota. Bai Zhu polysaccharides have documented anti-tumour activity in pre-clinical models. Clinical research confirms benefits in digestive disorders, PCOS (improving insulin sensitivity and ovulation rates), recurrent respiratory infection and as a uterine-calming agent in threatened miscarriage.

10. Incompatibilities

Bái Zhú (白术) White Atractylodes rhizome is not listed in either of the two classical incompatibility texts — Shi Ba Fan (Eighteen Antagonisms) or Shi Jiu Wei (Nineteen Mutual Inhibitions). As with every Chinese herb it should be prescribed only as part of a balanced formula by a registered Chinese herbalist (RCHM), who will check for interactions with any other herbs and prescription medications you are taking.

11. Cautions and contraindications

Bai Zhu is generally very safe. Important considerations include:

• Yin deficiency with Heat — its warm, drying nature can aggravate Yin deficiency patterns
• Excess Heat or toxin accumulation — avoided or balanced with cooling herbs
• Stir-fried vs raw — stir-fried (chao) Bai Zhu is more tonifying and better for Spleen Qi deficiency with Dampness; raw Bai Zhu is more drying and better for external Dampness

Pattern contraindications

Contraindicated in Excess patterns (acute Heat, full Wind invasion, food stagnation, retained pathogens). Use cautiously where Damp accumulation is prominent — many Qi tonics are sweet and can be cloying. Avoid combining with simultaneous strong pathogen-clearing without the practitioner balancing the formula.

Modern drug interactions

Qi tonics can interact with corticosteroids, diabetes medications (variable effect on blood glucose) and antihypertensives. Tell your GP if you are taking warfarin, ciclosporin, antidiabetics or BP-lowering medication before starting a Qi-tonic formula.

Important: Chinese herbs should always be prescribed by a fully qualified herbalist who is a member of the Register of Chinese Herbal Medicine (RCHM). Never self-prescribe or self-administer Chinese herbs without professional guidance. Dr (TCM) Attilio D’Alberto is a member of the RCHM with over 25 years of clinical experience.

12. Treatment at my clinic

I prescribe Bái Zhú as part of tailored herbal formulas for conditions including PCOS, digestive disorders, IBS, oedema, threatened miscarriage and recurrent respiratory infections. Every prescription is individually formulated following a full TCM assessment and adjusted throughout treatment as the pattern responds.

I see patients in person at my clinic in Wokingham, Berkshire. Online Chinese herbal medicine consultations are available throughout the UK and internationally. Visit the prices page for consultation fees.

Return to the Chinese herb directory or the Chinese herbal medicine main page.

13. Frequently asked questions about Bai Zhu

What does Bai Zhu do?

Bai Zhu tonifies Spleen Qi and dries Dampness — addressing digestive weakness, fatigue, fluid retention and phlegm-damp patterns. It is one of the most widely used tonic herbs in Chinese medicine and appears in many classical formulas for digestive, metabolic, immune and pregnancy-related conditions.

Is Bai Zhu the same as Cang Zhu?

No — they are related but distinct. Bai Zhu (Atractylodes macrocephala) is sweet, bitter and warm; it is more tonifying and is used for deficient patterns. Cang Zhu (Atractylodes lancea) is more aromatic and drying, used for excess Dampness. They have overlapping but different clinical applications.

Can Bai Zhu help with weight loss?

Bai Zhu may help with weight gain associated with Spleen Qi deficiency and Dampness accumulation — the pattern that produces bloating, fluid retention, fatigue and poor digestion. It is not a direct fat-burning herb, but addressing this pattern often produces gradual weight normalisation. See my article on Chinese medicine for weight loss.

Is Bai Zhu safe during pregnancy?

Yes — Bai Zhu is one of the key pregnancy-safe tonic herbs in Chinese medicine and is specifically used in formulas for threatened miscarriage, morning sickness and pregnancy oedema. However, herbs in pregnancy should only be prescribed by a practitioner registered with the Register of Chinese Herbal Medicine.

Can I take Bai Zhu daily?

Bai Zhu is safe for sustained daily use when prescribed as part of a balanced formula. Taking individual herbs long-term without practitioner guidance is not recommended; Chinese medicine works through formulas that balance herbs against each other.

Does Bai Zhu help with PCOS?

Yes — Bai Zhu is frequently included in TCM formulas for PCOS, particularly where Phlegm-Dampness and Spleen Qi deficiency are contributing patterns. It helps regulate fluid metabolism, reduces bloating and supports weight management alongside the broader treatment approach.

What is the difference between raw and stir-fried Bai Zhu?

Raw Bai Zhu (sheng Bai Zhu) is more drying and is preferred where external Damp or strong damp obstruction is the main issue. Stir-fried Bai Zhu (chao Bai Zhu) is more tonifying and is preferred for Spleen Qi deficiency with internal Dampness — the more common clinical use. The two preparations are often interchanged within a formula depending on the desired emphasis.

Prefer to be treated from home? Chinese herbal medicine online consultations are available throughout the UK and worldwide. After a full video consultation, Dr (TCM) Attilio D'Alberto formulates a bespoke herbal prescription and posts your Chinese herbs directly to your door.