Herb

Yuan Zhi

Chinese senega root | 远志

Also known as:

Chinese Senega root , Polygala sibirica L. (alternative species) , Xiǎo Cǎo (小草, whole plant)

Yuan Zhi

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Properties

Spirit-calming herbs (安神药) · Warm

Traditionally supports*

Sleep Support Cognitive Health and Memory Emotional Wellbeing Respiratory 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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$60.00 ($0.60/g)
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About This Herb

Traditional Chinese Medicine background and properties

Herb Description

Yuan Zhi (Polygala root) is one of the most important herbs in Chinese medicine for supporting mental clarity, memory, and emotional calm. It is commonly used for insomnia, poor concentration, anxiety, and excessive phlegm, and has been a favourite of scholars and students for centuries. Modern research has also investigated its potential for neuroprotection and cognitive support.

Herb Category

Spirit-calming herbs (安神药) Herbs that nourish the Heart and calm the Spirit (养心安神药)

Main Actions

  • Calms the Spirit and Benefits Intelligence
  • Expels Phlegm and Opens the Orifices
  • Promotes Heart-Kidney Communication
  • Disperses Swelling and Dissipates Abscesses

How These Actions Work

'Calms the Spirit and benefits intelligence' (安神益智) means Yuan Zhi settles a restless mind and sharpens mental clarity. It enters the Heart channel to nourish the Heart's capacity to house the Spirit (Shen), which is why it is used for insomnia, palpitations, poor memory, and anxiety caused by overthinking or emotional strain. The name Yuan Zhi literally means 'far-reaching will,' reflecting the ancient belief that it strengthens willpower and memory.

'Expels Phlegm and opens the orifices' (祛痰开窍) means Yuan Zhi dissolves Phlegm that blocks the Heart's sensory 'openings,' restoring mental clarity. In TCM, when Phlegm obstructs the Heart, it can cause confusion, muddled thinking, seizures, or even loss of consciousness. Yuan Zhi's bitter and pungent taste enables it to cut through and disperse this Phlegm. It also acts on the Lungs to help expel sticky sputum in cases of chronic cough.

'Promotes communication between the Heart and Kidneys' (交通心肾) refers to Yuan Zhi's ability to restore the normal flow between the Heart (which governs fire and mental activity) and the Kidneys (which govern water and the foundation of willpower). When these two organs lose contact, symptoms like insomnia, restlessness above and cold weakness below can arise. Yuan Zhi, which enters both the Heart and Kidney channels, helps bridge this gap.

'Disperses abscesses and reduces swelling' (消散痈肿) means Yuan Zhi can be taken internally or applied externally to treat boils, carbuncles, and breast abscesses. Its pungent and bitter warmth moves Qi and Blood through areas of stagnation, helping to resolve painful swellings. This use is documented in classical texts such as the Ben Cao Gang Mu.

Patterns Addressed

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

When the Heart and Kidneys lose their normal communication, Heart Fire fails to descend and Kidney Water fails to ascend. This produces restlessness, insomnia, and anxiety above, with weakness and poor memory below. Yuan Zhi is warm, bitter, and pungent, entering both the Heart and Kidney channels. It acts as a messenger between these two organs, helping Heart Fire descend to warm the Kidneys while facilitating Kidney essence in nourishing the Heart Spirit. This dual channel entry makes it uniquely suited for this pattern, unlike herbs that only calm the Heart or only tonify the Kidneys.

A practitioner would look for one or more of these signs

Insomnia

Difficulty falling or staying asleep due to a restless, unsettled mind

Severe Heart Palpitations

Palpitations worse at night or when trying to rest

Poor Memory

Forgetfulness and difficulty concentrating, especially from mental overwork

Anxiety

Low-grade anxiety with a sense of mental unease

TCM Properties

Temperature

Warm

Taste

Bitter (苦 kǔ), Acrid / Pungent (辛 xīn)

Channels Entered
Heart Kidneys Lungs
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

The best quality Yuan Zhi (远志筒) consists of thick, tubular root bark pieces with the woody core fully removed, appearing as hollow cylinders. The surface should be greyish-yellow to greyish-brown with dense, deeply set horizontal wrinkles. The cross-section should show a brownish-yellow bark layer. The texture should be hard but brittle, snapping cleanly when broken. It should have a faint grassy smell and a distinctly bitter, slightly acrid taste that produces a characteristic prickling or scratching sensation in the throat when chewed. Avoid pieces that still contain the woody core (远志棍, lower grade), pieces that are overly thin or fragmentary, or material that lacks the characteristic throat-prickling sensation, as this may indicate adulteration or poor quality.

Primary Growing Regions

Yuan Zhi is distributed across northeast, north, northwest, and central China as well as Sichuan. It is mainly produced in Shanxi, Shaanxi, Hebei, and Henan provinces. The traditionally recognised finest quality (道地药材) comes from Shanxi province, particularly the Yuncheng area (including Xinjiang, Wenxi, and Jiangxian counties), where it has been harvested since ancient times. Shandong (around Taishan and Heze) was the earliest recorded production area, noted in the Ming Yi Bie Lu. Hebei province (especially the Handan area) also produces significant quantities of both wild and cultivated Yuan Zhi.

Harvesting Season

Spring (before new growth emerges) or autumn (after the above-ground parts have withered), typically in the 3rd or 4th year after planting.

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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Instructions for safe storage and consumption

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Traditional Dosage Reference

Standard

3-10g

Maximum

Up to 10g in standard decoction per the Chinese Pharmacopoeia. Historical analysis suggests that doses of raw powder exceeding approximately 6g may provoke nausea and vomiting. Do not exceed standard range without practitioner supervision.

Notes

Use the lower end of the range (3-5g) for calming the spirit and settling palpitations. Higher doses (6-10g) may be used for resolving phlegm and opening the orifices. The processed form (制远志, prepared with Gan Cao water) is standard for most clinical applications and is gentler on the stomach. Honey-processed Yuan Zhi (蜜远志) is preferred when the primary goal is resolving phlegm and cough, as honey enhances the expectorant action while further buffering gastric irritation. Raw Yuan Zhi has stronger expectorant action but greater potential for stomach upset. For external use on abscesses and swellings, the raw powder is mixed with wine and applied topically with no specific dose limit.

Processing Methods

Processing method

The wooden core (heart) is removed from the root. Licorice (Gan Cao) is decocted in water, strained, and the Yuan Zhi segments are simmered in this liquid over gentle heat until all the licorice water is absorbed. Dried afterwards. Ratio: 6kg licorice per 100kg Yuan Zhi.

How it changes properties

The licorice preparation moderates Yuan Zhi's harsh, throat-irritating quality (the raw herb has a strong prickling sensation in the throat due to its saponin content). It also enhances the herb's ability to calm the Spirit and benefit intelligence by adding the harmonising, Spleen-supporting effect of licorice. The thermal nature remains warm but the drying, irritating quality is significantly reduced.

When to use this form

This is the most commonly used clinical form. Choose Zhi Yuan Zhi when the primary goal is calming the Spirit, improving memory, and treating insomnia or palpitations. It is gentler on the stomach than the raw form and is the standard form in most prescriptions.

Toxicity Classification

Non-toxic

Yuan Zhi is classified as non-toxic in the Chinese Pharmacopoeia, but its saponin content (the main active component group) is also the primary source of adverse effects. These saponins stimulate the gastric mucosa, which can cause nausea, vomiting, and gastric discomfort, especially with raw herb or at higher doses. The saponins also have significant hemolytic (red blood cell-dissolving) activity when injected, though this is not clinically relevant at standard oral doses. The LD50 of raw Yuan Zhi in mice is approximately 15.3 g/kg (oral), while honey-processed Yuan Zhi has a higher LD50 of approximately 19.7 g/kg, confirming that processing reduces toxicity. Case reports of unprocessed Yuan Zhi in formulas have noted nausea, mouth numbness, throat irritation, and even transient facial nerve symptoms. Proper processing with Gan Cao (licorice) water or honey (制远志 or 蜜远志) substantially mitigates these gastrointestinal side effects and is essential for safe clinical use.

Contraindications

Caution

Gastric ulcers or gastritis: Yuan Zhi's saponin content strongly irritates the gastric mucosa, which can worsen existing stomach conditions and cause nausea, vomiting, or gastric pain.

Caution

Excess Heat or Phlegm-Fire patterns (实热或痰火内盛): Yuan Zhi is warm in nature and can aggravate internal Heat conditions.

Caution

Yin deficiency with Heat signs: the warm, acrid, and drying nature of Yuan Zhi can further deplete Yin and intensify deficiency Heat.

Caution

Pregnancy: pharmacological studies show Yuan Zhi decoction has a stimulating effect on the uterus in both pregnant and non-pregnant animals. Use only when clearly indicated and under practitioner supervision.

Caution

Raw, unprocessed Yuan Zhi taken internally in powder form at higher doses: historical texts and modern case reports note side effects including nausea, vomiting, facial nerve numbness, and throat irritation. Always use the processed (制远志) form for internal administration.

Classical Incompatibilities

Yuan Zhi does not appear on the classical Eighteen Incompatibilities (十八反) or Nineteen Mutual Fears (十九畏) lists. However, the Ben Cao Jing Ji Zhu notes that Yuan Zhi 'fears' (畏) Zhen Zhu (pearl), Li Lu (Veratrum nigrum), Fei Lian (cockroach), and Qi Ge. This is a classical caution from the older 'seven relations' (七情) system rather than the standardised Eighteen/Nineteen lists.

Special Populations

Pregnancy

Use with caution during pregnancy. Pharmacological studies have demonstrated that Yuan Zhi decoction has a clear stimulating effect on uterine smooth muscle in both pregnant and non-pregnant animals (guinea pigs, rabbits, cats, and dogs). Intravenous injection of the decoction in pregnant dogs showed marked excitatory effects on the uterus in situ. While there are no formal human studies, the uterine-stimulating activity of its saponin components represents a meaningful risk of promoting uterine contractions. It should only be used during pregnancy when clearly indicated, at conservative doses, and under the supervision of a qualified practitioner.

Breastfeeding

No specific safety data exists for the use of Yuan Zhi during breastfeeding. Given its saponin content and the general principle that bioactive compounds may transfer through breast milk, caution is advised. The herb's bitter, acrid nature may also theoretically affect the flavour of breast milk. Use only when clinically indicated and under practitioner guidance. Monitor the nursing infant for any signs of gastrointestinal upset.

Pediatric Use

Yuan Zhi may be used in children at reduced dosages appropriate to the child's age and body weight, typically one-third to one-half of the adult dose. Due to its saponin content and potential for gastric irritation, always use the processed form (制远志 or 蜜远志) rather than the raw herb. Honey-processed Yuan Zhi (蜜远志) is generally preferred for children as it is gentler on the stomach. Not recommended for infants under one year of age.

Drug Interactions

No well-documented interactions with specific pharmaceutical drugs have been established through clinical studies. However, based on known pharmacological properties, the following theoretical interactions should be considered:

  • Sedative and hypnotic medications: Yuan Zhi has demonstrated sedative and hypnotic-potentiating effects in animal studies (synergy with barbiturates). Concurrent use with benzodiazepines, other sedatives, or CNS depressants may result in additive sedation.
  • Cholinesterase inhibitors (donepezil, rivastigmine): Preclinical research suggests Yuan Zhi extracts may enhance cholinergic function. Theoretically, combined use could produce additive cholinergic effects, though clinical significance is unknown.
  • Anticoagulant/antiplatelet drugs: The saponins in Yuan Zhi have hemolytic activity in vitro. While this does not directly equate to clinical anticoagulant effects at normal oral doses, caution may be warranted in patients on blood-thinning medications.

These are theoretical considerations based on pharmacological profiles, not confirmed clinical interactions. Patients taking prescription medications should inform their healthcare providers before using Yuan Zhi.

Dietary Advice

Avoid excessively greasy, rich, or hard-to-digest foods while taking Yuan Zhi, as the herb's saponins can already irritate the stomach. Taking Yuan Zhi after meals rather than on an empty stomach can help reduce gastric discomfort. Classical sources mention avoiding pork, cold water, and raw scallions when taking formulas containing Yuan Zhi (as noted in the Xiao Cao Wan prescription). Warm, easily digestible foods are preferred.

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.