Nuo Dao Gen
StarOryza sativa L. var. glutinosa Matsum.
Traditionally used for
- Nose & throat
- Colds & fever
- Digestion
- Energy & fatigue
☯ TCM Properties
Consolidates the Exterior and Stops Sweating; Benefits the Stomach and Generates Fluids; Clears Deficiency Heat
Traditional Chinese Uses
Nuo Dao Gen (glutinous rice root, root and rhizome of sticky rice plant) is a mild, sweet, neutral herb used in Chinese medicine primarily to stop excessive sweating — both spontaneous daytime sweating and night sweating from deficiency. It also generates Body Fluids to relieve dry mouth and throat, and gently clears deficiency heat for low-grade fever from exhaustion or chronic illness. Its gentle, food-safe character makes it appropriate for prolonged use in convalescence and post-illness recovery.
Relationships
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Botanical Description
Oryza sativa var. glutinosa, glutinous or sticky rice, is an annual cereal grass in the Poaceae, an ancient cultivated form of Asian rice distinguished from common rice principally by an almost amylopectin-only starch composition in the grain. The plant grows 60-150 cm tall with hollow erect culms, jointed at the nodes, and long narrow linear leaves with prominent ligules and auricles at the base of the blade. The fibrous root system consists of numerous slender adventitious roots arising from the lower nodes, forming a dense mat in the flooded paddy. Flowers are borne in lax open terminal panicles of small one-flowered spikelets; the grain is enclosed in a hardened lemma and palea. After harvest of the grain, the dried fibrous roots and rhizomes dug from the stubble constitute Nuo Dao Gen.
Active Constituents
Oryzativol A
LignanA lignan isolated from the roots of Asian rice, Oryza sativa. In mesenchymal stem cells it suppressed adipocyte differentiation while promoting osteoblast differentiation. Note that the isolation work was done on rice roots generally, not on the glutinous variety that supplies this drug, and no quantitative content in the medicinal root has been published.
Oryzativol B
LignanThe second of two novel lignans reported from Oryza sativa roots alongside oryzativol A, isolated by bioassay-guided fractionation of the root extract. As with oryzativol A, the source material was rice root rather than the glutinous-rice root specifically.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| decoction | 15–30 g | Daily | — | — | Standard oral dose per Xi S, Gong Y. Essentials of Chinese Materia Medica and Medical Formulas. Academic Press/Elsevier, 2017, pp. 383–384. Exact wording: Normally, 15–30 g is decocted with water as an oral |
Evidence Tier
Limited evidence · 1 studyRecorded studies by study design, strongest design at the top. This is a study-design tier only, not a GRADE rating: it does not weigh risk of bias, consistency or precision.
Systematic review / meta-analysis
0
Randomized controlled trial
0
Other clinical trial
0
Observational / case report
0
In vitro / animal
1
1 verified · 0 unverified
Other / unclassified
0
Verified: design read from PubMed for a DOI that resolves to the cited paper Unverified: taken from the study's recorded description
Clinical Studies
Chemical Characterization of Novel Natural Products from the Roots of Asian Rice (Oryza sativa) that Control Adipocyte and Osteoblast Differentiation
An ethanol extract of Oryza sativa root reciprocally regulated adipocyte and osteoblast differentiation in cell culture; bioassay-guided fractionation yielded two new lignans, oryzativols A and B, with oryzativol A suppressing adipogenesis and enhancing osteoblast development. This is the only substantive chemistry available for rice root, and it does not address the traditional anhidrotic use of Nuo Dao Gen or use the glutinous variety.
⚠ Safety & Contraindications
Contraindications
Its use is cautious in patients with exterior pathogen.
Source: Xi S, Gong Y. Essentials of Chinese Materia Medica and Medical Formulas. Academic Press/Elsevier, 2017, pp. 383–384.
Historical Texts
Ben Cao Zai Xin
Qing dynastyReferences
- Kusumawati AH, Garmana AN, Elfahmi E, Mauludin R. Pharmacological studies of the genus rice (Oryza L.): a literature review . Brazilian Journal of Biology (2023) [DOI]
This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.
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