Roots and rhizomesTonifyingRhizoma Polygonati Odorati

Yu Zhu (Fragrant Solomonseal Rhizome)

A practical guide to Yu Zhu: what it is, how Traditional Chinese Medicine uses it, the classical formulas it appears in, and who should be careful with it.

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Last reviewed Oct 13, 2026

Quick Facts

Latin NameRhizoma Polygonati Odorati
Chinese Name & Pinyin 玉竹 · Yu Zhu
Medicinal PartRoots and rhizomes
The herbYu Zhu is the dried, flattened-cylindrical, translucent, jointed rhizome of Polygonatum odoratum. Huang Jing is a different official drug. The classical name is Wei Rui.
Nature and channelsSweet, slightly cold. Enters the Lung and Stomach. Sweetness nourishes yin. Slight cold clears dryness-heat in the Lung and Stomach.
Pharmacopoeia lineNourishes yin and moistens dryness. Generates fluids and stops thirst. Used for Lung–Stomach yin damage, dryness-heat cough, dry throat and thirst, and interior-heat wasting-thirst.
Pattern cuesDry cough with little sputum. Dry throat and thirst. Wasting-thirst. Red tongue with little fluid.
In this articleYu Zhu versus Huang Jing, Mai Dong, and Bei Sha Shen. Why yin-deficiency exterior patterns should not be treated as “just moisten the cough.” Why loose stools are a stop sign. Who should skip it.

What Is Yu Zhu?

Yu Zhu (玉竹; Yù Zhú; Latin: Polygonati Odorati Rhizoma; English: fragrant Solomon’s seal rhizome) is the dried rhizome of Polygonatum odoratum (Mill.) Druce. In Chinese medicine it is a yin-nourishing herb. The classical name is Wei Rui. It is sweet and slightly cold, enters the Lung and Stomach channels, and its core actions are to nourish yin and moisten dryness, and to generate fluids and stop thirst. It is not Huang Jing. Solomon’s seal of other Polygonatum species used as Huang Jing tonifies qi and yin, strengthens the spleen, and also benefits Lung and Kidney. It is more cloying. Yu Zhu is lighter. It is specific for Lung–Stomach dryness and less greasy. It is not Mai Dong or Bei Sha Shen. Mai Dong more clearly clears the Heart. Bei Sha Shen nourishes yin in a similar range but is a different root. Garden Polygonatum is not the official piece.

It is used most often for three patterns:

  • Dry Lung cough — dry cough with little sputum, dry throat
  • Stomach yin deficiency — thirst, hunger without desire to eat
  • Yin-deficiency exterior pattern / interior-heat wasting-thirst — this needs pattern diagnosis; do not moisten every cough

It is usually used raw. The usual decoction dose is 6–12 g. Phlegm-damp obstruction, spleen-deficiency loose stools, and wind-cold cough are a poor match. Sweet-cold and moistening, it is not an unlimited autumn “yin bamboo root.” Jia Jian Wei Rui Tang uses Yu Zhu when a yin-deficient body catches wind-heat. That is not a DIY cold tea.

When dryness-heat damages Lung and Stomach yin, dry cough and thirst are common. Yu Zhu is sweet-cold and moistening without much cloying. It nourishes, moistens, and generates fluids, which is why it is often paired with Sha Shen and Mai Dong. It moistens and clears more than it warms. Thin white sputum, bloating, and loose stools get worse if more moisture is added.

Yu Zhu is not a catch-all moistening cough herb. In wind-cold or spleen-deficiency dampness, using it alone can generate dampness and obstruct the spleen. Whether it belongs in a Jia Jian Wei Rui Tang–type formula should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.

Yu Zhu Fragrant Solomonseal

Yu Zhu: Materia Medica Profile

Identification & Quality Standard

Rhizoma Polygonati Odorati

Botanical Origin

The dried rhizome of Polygonatum odoratum (Mill.) Druce.(Liliaceae)

Production Regions

Primarily produced in the Chinese provinces of Hunan, Henan, Jiangsu, Zhejiang.

Quality Requirements

Superior medicinal material is fat and strong, long, yellowish-white, smooth and glossy, translucent, sweet.

Macroscopic Features

Long cylindrical, slightly flat, lack of branches, 4~18cm long, 0.3~1.6cm diameter. Externally yellowish-white or pale yellowish-brown, translucent, with longitudinal wrinkles and slightly bulging nodes, with white round spots of rootlet scar and disc-like stem scars. Hard and brittle or slightly soft texture, easily broken, fractured surface is horn-like or granular. faint odor, sweet taste, sticky when chewed.

Authentic Origins and Quality Identification

  • Best Regions: It is primarily produced in provinces like Hunan, Hubei, Jiangsu, and Zhejiang.
  • Quality Markers: Hunan-grown Yu Zhu is often thicker, yellowish-white, translucent, and soft. Jiangsu varieties tend to be thinner and slightly darker. High-quality pieces are translucent, slightly sweet, and feel a bit sticky when chewed. Steamed versions are darker, softer, and stickier.
  • Look-alikes: It is sometimes confused with Huang Jing (Siberian Solomon's Seal). However, Huang Jing has more obvious nodules on the root and tastes sweeter but with a slightly bitter aftertaste, making them distinctly different in both look and smell.

Traditional Properties & Historical Lineage

Nature, Flavour & Channel Tropism

Sweet; NeutralLungStomach

1. Historical Records in Herbal Classics

  • Shen Nong Ben Cao Jing: Ranked as a top-tier herb, it was noted for treating sudden heat and physical weakness.
  • Ming Yi Bie Lu: Added that it helps clear "empty heat," damp-toxins, and certain eye conditions.
  • Ben Cao Gang Mu: Summarized its core strengths: "Moistens dryness, generates fluids, clears restlessness, and stops thirst."
  • Zhong Hua Ben Cao: Modern texts consolidate its primary actions simply as "nourishing Yin, moistening dryness, generating fluids, and quenching thirst."

2. Evolution of Medicinal Understanding

The understanding of Yu Zhu has evolved over centuries. Early texts (Han Dynasty) focused on its ability to treat physical weakness and unblock meridians. By the Ming Dynasty, experts shifted the focus to its excellent fluid-generating and dryness-moistening properties. Today, it is not seen as a "cure-all" tonic, but rather a specialized, gentle herb for nourishing Yin and clearing dry heat without burdening the stomach.

Yu Zhu Fragrant Solomonseal

Core Efficacies & Traditional Applications

Traditional Functions

Nourishes yin, moistens lung, nourishes stomach, engenders fluid. Apply to dry cough, strained cough, dry throat and thirst due to damage of yin and fluid caused by febrile disease, diabetes due to inner heat, and exterior disease due to yin deficiency, dizziness and vertigo, spasm pain of sinew.

1. Primary Focus: Nourishing Yin and Moistening Dryness

  • Traditional Function: Yu Zhu (Solomon's Seal Rhizome) gently nourishes Yin and bodily fluids, specifically targeting dryness in the Lungs and Stomach.
  • Target Symptoms: It helps with dry coughs with little phlegm, sore and dry throat, dry mouth, poor appetite, dry stools, and dry skin or cracked lips caused by a lack of internal moisture.
  • Common Pairings: For Lung and Stomach dryness, it is often paired with Mai Dong (Ophiopogon Tuber) and Sha Shen (Glehnia Root). For dry coughs, it pairs well with Sang Ye (Mulberry Leaf) and Xing Ren (Apricot Seed).
  • When to Avoid: Do not use if you have severe "cold-dampness" (frequent chills, loose stools, thick white tongue coating) or are in the early stages of a cold/flu with chills and a runny nose, as it can worsen these conditions.

2. Secondary Focus: Generating Fluids and Quenching Thirst

  • Traditional Function: It replenishes fluids to relieve severe thirst and restlessness caused by fluid depletion.
  • Target Symptoms: Excessive thirst after a fever, dry mouth and throat after staying up late, or scanty dark urine and dry stools.
  • Common Pairings: Combined with Tian Hua Fen (Trichosanthes Root) and Lu Gen (Reed Rhizome) for strong thirst-quenching, or Sheng Di Huang (Rehmannia Root) and Xuan Shen (Figwort Root) for internal heat and restlessness.
  • When to Avoid: Avoid if you have Spleen/Stomach cold-deficiency (stomach cramps, loose stools) or excessive "excess heat" (high fever, severe constipation) where stronger herbs are needed.

3. Common Herb Pairings: Synergistic Duos

  • A classic pair is Yu Zhu (Solomon's Seal Rhizome) and Mai Dong (Ophiopogon Tuber).
  • Why it works: Mai Dong moistens the Lungs, nourishes the Stomach, and clears heart heat, while Yu Zhu nourishes Yin and generates fluids. Together, they powerfully relieve dry coughs, dry mouth, and irritability. Note: Dosages should be adjusted by a TCM professional; do not mix arbitrarily.

Yu Zhu Fragrant Solomonseal

Modern Research

Modern research offers useful context, but Traditional Chinese Medicine prescribes on whole-pattern diagnosis rather than isolated compounds.

(Note: Modern laboratory research is preliminary and should not replace traditional clinical diagnostics.)

1. Main Chemical Components

Modern scientific analysis reveals that Yu Zhu contains polysaccharides, flavonoids, saponins, and volatile oils. The most heavily researched component is Yu Zhu polysaccharides.

2. Modern Pharmacological Focus

Current laboratory research (mostly in test tubes and animal models) is exploring a few areas:

  • Antioxidant Properties: Polysaccharides show potential in protecting cells from oxidative stress in lab settings.
  • Blood Sugar and Immunity: Animal studies suggest its extracts might help regulate immune function and show a trend in balancing blood sugar levels.
  • Respiratory Health: Some animal studies observe protective effects on the respiratory mucosa.

3. Limitations of Modern Research

  • Lab vs. Human Body: Results from petri dishes or mice do not automatically translate to how the human body will react.
  • Extracts vs. Whole Herbs: Lab studies use highly concentrated extracts (like isolated polysaccharides), which are entirely different from drinking a traditional brewed tea of whole Yu Zhu root.
  • Holistic Synergy: In TCM, the herb's therapeutic effect comes from the complex interaction of all its compounds, not just one isolated chemical. Single-component research cannot fully represent the herb's traditional value.

Yu Zhu Fragrant Solomonseal

Comparing Similar Herbs

1. Shared Traits with Similar Herbs

Yu Zhu and Mai Dong (Ophiopogon Tuber) both nourish Yin and moisten dryness, treat Lung and Stomach fluid deficiency (like dry cough and dry mouth), and are commonly used in daily wellness teas.

2. Core Differences

  • Nature: Yu Zhu is neutral and mild, perfect for daily gentle nourishment. Mai Dong is slightly cold, making it better for individuals with mild internal heat.
  • Action Focus: Yu Zhu gently moistens without being greasy or heavy. Mai Dong focuses more on clearing Heart heat and relieving irritability and insomnia.
  • Action Direction: Yu Zhu is purely moistening and neutral. Mai Dong has a slight downward-clearing action for "empty fire" in the upper body.
  • Target Symptoms: Use Yu Zhu for pure dryness (dry throat, lips, cough) without obvious heat. Use Mai Dong when dryness is accompanied by mild "empty heat" (warm palms/soles, restlessness, night sweats).
  • Contraindications: Avoid Yu Zhu for cold-dampness; avoid Mai Dong for Spleen/Stomach cold-deficiency.

3. A One-Sentence Summary

Yu Zhu (Solomon's Seal Rhizome) gently moistens the Lungs and Stomach, while Mai Dong (Ophiopogon Tuber) moistens dryness while clearing "empty fire" and calming the Heart.

Yu Zhu Fragrant Solomonseal

Classical Formulas Containing Yu Zhu

Formulas vs. Single Herbs

  • Synergy is Key: A formula is a balanced team. The healing power comes from how the herbs interact, so a single herb cannot simply replicate a full formula's effects.
  • Holistic Balance: The exact dosage and combination in a formula affect the entire body. Never try to mix or alter these formulas at home based on internet articles.

Diet & Daily Home Use

1. Home Herbal Teas

  • Yu Zhu and Mai Dong Tea:
    • Ingredients: 3g Yu Zhu (Solomon's Seal Rhizome), 2g Mai Dong (Ophiopogon Tuber), 1g Goji berries.
    • Method: Rinse, steep in warm water (around 80°C) for 10-15 minutes. Refill until flavorless.
    • Best For: Relieving dry mouth and throat from air conditioning, staying up late, or vocal strain in autumn and winter.
    • Avoid If: You have a weak, cold Spleen/Stomach or loose stools. Drink 2-3 times a week; avoid continuous long-term use. Make sure you are using quality medicinal herbs, not degraded cooking scraps.

2. Preparation Differences

  • Raw vs. Steamed: Raw Yu Zhu clears dry heat better (great for dry coughs). Steamed Yu Zhu is softer and richer, better for long-term Stomach nourishment (improving appetite and dry mouth).
  • Brewing: No special steps are needed. Boil it directly with other ingredients in water for 20-30 minutes. Do not swap raw herbs directly with extracts or powders, as their potencies differ drastically.

3. Dosage and Usage Cycles

  • Dosage: Clinical doses are 6-12g. For home food therapy, stick to a much smaller 3-5g.
  • Duration: Do not use continuously for more than 2 weeks. Take a 1-week break before resuming. Consult a doctor for use during pregnancy, in children, or if you have chronic illnesses.
Yu Zhu Fragrant Solomonseal

Contraindications & Safety Warnings

1. Who Should Avoid It

  • Cold-Dampness: Those with frequent chills, cold limbs, loose stools, or a thick white tongue coating.
  • Vulnerable Groups: Pregnant and nursing women, young children, and the elderly should use this only under professional guidance.
  • Organ Dysfunction: Individuals with abnormal liver or kidney function should avoid it to prevent extra metabolic burden.
  • Allergies: Anyone allergic to plants in the Liliaceae (Lily) family.

2. Medication Interactions and Dietary Notes

  • Drug Interactions: It may lightly affect blood sugar, so monitor closely if taking diabetes medications. Consult a doctor if you are on blood thinners, sedatives, or blood pressure medications before starting this herb.
  • Diet: Avoid extremely spicy, greasy, or heavy foods while taking this herb, as they counteract its moistening effects and can cause stomach upset.

3. Adverse Reactions and Overdose

  • Side Effects: Normal doses are very safe. Overuse can cause bloating, indigestion, or loose stools, especially in those with weak digestion.
  • Emergency: Stop immediately and seek medical help if you experience severe allergic reactions, persistent vomiting, breathing difficulties, or a rapid worsening of symptoms. Do not attempt to self-treat emergencies.

Frequently Asked Questions About Yu Zhu

What is Yu Zhu? Are Huang Jing, Mai Dong and Bei Sha Shen the same?
Official Yu Zhu (玉竹) is the dried rhizome of Polygonatum odoratum, the classical name Wei Rui. The pharmacopoeial name is Polygonati Odorati Rhizoma. Huang Jing is a related Polygonatum: sweet-neutral, tonifies qi and Yin, strengthens the Spleen, moistens the Lung and benefits the Kidney—Spleen-Lung-Kidney, broader and more cloying. Mai Dong is sweet, slightly bitter and slightly cold: nourishes Yin, generates fluid, moistens the Lung and clears the Heart. Bei Sha Shen is sweet, slightly bitter and slightly cold: nourishes Yin, clears the Lung and benefits Stomach fluid. Yu Zhu is sweet-moistening without much cloy, leaning toward Lung-Stomach Yin damage with dry-heat thirst. Write Yu Zhu. Kitchen “Yu Zhu sweet soup” is not the pharmacopoeial 6–12 g in decoction.
What are the TCM properties and traditional uses of Yu Zhu?
According to the Chinese Pharmacopoeia, Yu Zhu is sweet and slightly cold, enters the Lung and Stomach channels, and acts to nourish Yin, moisten dryness, generate fluid and quench thirst. It is used for Lung-Stomach Yin damage, dry-heat cough, dry throat and thirst, and interior-heat wasting-thirst. Sweet-moistening and slightly cold, it suits dryness-heat damaging Yin—not long use in phlegm-damp qi stagnation or Spleen vacuity with loose stool.
How do you choose raw versus steamed Yu Zhu? Can it be drunk daily as a sweet soup?
Nourishing Yin and generating fluid more often use sun-dried or lightly steamed translucent slices. As food-and-medicine it may be soup; treatment doses differ from diet. Those with phlegm-damp greasy coat and loose stool should not take it long as a single-herb “beauty soup.”
What is the usual dosage? Can it be drunk daily as a Lung-moistening sugar-lowering tea?
The pharmacopoeial decoction dose is 6–12 g. It is not a four-season “Yu Zhu sugar tea.” Phlegm-damp qi stagnation only grows more stagnant. Dry cough and wasting-thirst need a practitioner; diabetes cannot rest on Yu Zhu alone.
What are the contraindications? Can it be used in pregnancy?
Forbid in phlegm-damp qi stagnation; use caution in Spleen vacuity with loose stool. Unsuitable in wind-cold cough with copious thin phlegm. Pregnancy may use it under guidance for Yin damage; use caution in middle fullness. Stop if epigastric stuffiness and loose stool appear.
Can Yu Zhu nourish Yin, moisten dryness and quench thirst?
It can help Lung-Stomach Yin damage. Dry-heat cough with dry thirsty throat joins Glehnia / Adenophora, Ophiopogon and licorice in a Sha Shen Mai Dong type pairing. Yin-vacuity external wind-heat may follow the Jia Jian Wei Rui Tang idea. Sweet-moistening, it generates fluid—not a specific for every cough, every thirst or every wasting-thirst. High fever with fluid collapse and diabetic ketoacidosis need emergency or specialty care.
Can Yu Zhu be drunk daily as a beauty, sugar-lowering or Lung-moistening soup?
Lung-Stomach Yin damage and autumn-dryness throat may enter short diet therapy or a formula; phlegm-damp Spleen vacuity only grows more cloying. “Yu Zhu whitens and lowers sugar” does not replace dermatologic and glycemic assessment. Nourishing Yin, moistening dryness and generating fluid should name Yu Zhu 6–12 g.
How do you choose among Yu Zhu, Huang Jing, Mai Dong, Bei Sha Shen and Tian Hua Fen?
Fragrant Solomon’s seal is sweet and slightly cold: nourishes Yin, moistens dryness, generates fluid and quenches thirst—Lung-Stomach, moistening without much cloy, suited to febrile damage of Yin and dry cough. Siberian Solomon’s seal is sweet-neutral: tonifies qi and Yin, strengthens the Spleen, moistens the Lung and benefits the Kidney—broader and more cloying. Ophiopogon is sweet, slightly bitter and slightly cold: nourishes Yin, generates fluid, moistens the Lung and clears the Heart—stronger at clearing the Heart. Glehnia is sweet, slightly bitter and slightly cold: nourishes Yin, clears the Lung and benefits Stomach fluid—stronger at clearing the Lung. Trichosanthes root is bitter, slightly sweet and slightly cold: clears heat, drains fire, generates fluid, quenches thirst and expels pus—stronger at clearing heat. Lung-Stomach Yin damage favors Yu Zhu; dual qi-Yin vacuity favors Huang Jing; Heart vexation favors Mai Dong; dry cough favors Bei Sha Shen; exuberant heat with vexing thirst favors Tian Hua Fen. They may be paired; phlegm-damp qi stagnation and Spleen vacuity with loose stool forbid pure sweet moistening.
Which herbs is Yu Zhu combined with? What are the representative formulas?
Lung-Stomach Yin damage joins Glehnia / Adenophora, Ophiopogon, licorice and mulberry leaf in a Sha Shen Mai Dong type pairing. Yin-vacuity external wind-heat follows the idea of Jia Jian Wei Rui Tang (Wei Rui is Yu Zhu). Write Yu Zhu 6–12 g; forbid in phlegm-damp qi stagnation.
How do you choose and store Yu Zhu?
Choose long even bars, yellow-white or translucent, a horny cross-section, a sweet sticky taste and few rootlets. Hollow, moldy, moth-eaten lots mixed with Huang Jing or an unidentified rhizome are discarded. Store airy and dry against mold and moths. Buy pharmacopoeial Yu Zhu; do not replace nourishing Yin, moistening dryness and generating fluid with Huang Jing or an unidentified lily-family rhizome by equal weight.

Related Products

Nong's Yu Zhu Concentrated GranulesNong's Yu Zhu (Solomon's Seal, Fragrant) Single Herb 5:1 Concentrated Granules $35.20 Hoi Tin Sha Shen Mai Dong Tang Extract GranulesHoi Tin Sha Shen Mai Dong Tang (Glehnia and Ophiopogon Decoction) 5:1 Concentrated Granules $24.93 Nong's Sha Shen Mai Dong Tang Extract GranulesNong's Sha Shen Mai Dong Tang (Glehnia and Ophiopogon Decoction) 5:1 Concentrated Granules $59.81 Tian Jiang Sha Shen Mai Dong Tang Concentrated GranulesTian Jiang Sha Shen Mai Dong Tang (Glehnia and Ophiopogon Decoction) 5:1 Concentrated Granules $65.16 Nong's Yi Wei Tang Extract GranulesNong's Yi Wei Tang (Benefit the Stomach Decoction) 5:1 Concentrated Granules $38.41

Medical Disclaimer — This article is provided for educational purposes only and describes traditional Chinese medicine concepts. It is not medical advice, and it is not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified practitioner before using any herb, particularly if you are pregnant, nursing, taking medication or managing a diagnosed condition.

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Yu Zhu (Fragrant Solomonseal): Nourish Yin, Moisten Dryness, and Generate Fluids