Dàn Dòu Chǐ (淡豆豉) — Prepared Soybean
On this page
- Overview
- Properties
- Actions and indications
- Modern research
- Incompatibilities
- Cautions and contraindications
- Treatment at my clinic
1. Overview
Dàn Dòu Chǐ (淡豆豉) is the prepared (fermented) soybean — mature seeds of Glycine max fermented with herbs such as Sang Ye and Qing Hao. It belongs to the category of Cool-acrid herbs that release the Exterior in the Chinese Materia Medica. The herb has a mild, gentle action and is widely used in Chinese herbal medicine for early-stage colds and for residual heat with irritability after febrile illness.
I prescribe Dàn Dòu Chǐ as part of bespoke herbal formulas from pharmaceutical-grade granules sourced from Sun Ten in Taiwan.
2. Properties
| Pinyin name | Dàn Dòu Chǐ |
|---|---|
| Chinese characters | 淡豆豉 |
| Latin name | Glycine max (prepared seed) |
| English name | Prepared soybean / Fermented soybean |
| Nature | Cool |
| Flavour | Acrid, sweet, slightly bitter |
| Channels entered | Lung, Stomach |
| Category | Cool-acrid herbs that release the Exterior |
3. Actions and indications
Principal actions
- Releases the Exterior gently — suitable for both wind-cold and wind-heat
- Eases irritability and clears residual heat with restlessness in the chest
Indications
- Mild colds with chills, fever and slight headache — particularly when stronger exterior-releasing herbs are not needed
- Restlessness and insomnia after a febrile illness, with residual heat in the chest (classically in Zhi Zi Chi Tang)
4. Modern research
Prepared soybean retains many of the soy constituents (isoflavones, protein, lecithin) and acquires additional fermentation-derived compounds. Pharmacological studies report mild antipyretic and anti-inflammatory effects. The herb is well-tolerated and is one of the gentlest exterior-releasing agents in the materia medica.
5. Incompatibilities
Dàn Dòu Chǐ (淡豆豉) Prepared Soybean 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.
6. Cautions and contraindications
Generally well tolerated. Use with caution in patients with severe soy allergy.
Pattern contraindications
Contraindicated in Yin deficiency and in Cold patterns without Heat. Short courses only.
Modern drug interactions
Chai Hu modulates liver CYP enzymes and has been associated with rare hepatic reactions when combined with interferon — tell your GP if you are on antiviral or immunomodulator treatment. Other Wind-Heat releasers (Bo He, Sang Ye, Ju Hua) are generally well tolerated.
Important: Chinese herbs should always be prescribed by a fully qualified herbalist who is a member of the Register of Chinese Herbal Medicine (RCHM).
7. Treatment at my clinic
I prescribe Dàn Dòu Chǐ as part of tailored herbal formulas for mild early-stage colds, post-viral restlessness with poor sleep, and selected presentations of residual heat in the chest. Every prescription is individually formulated following a full TCM assessment.
I see patients in person at my clinic in Wokingham, Berkshire. Online Chinese herbal medicine consultations are available.
Return to the Chinese herb directory or the Chinese herbal medicine main page.
Prefer to be treated from home? Chinese herbal medicine online consultations are available throughout the UK and worldwide.
