Fruits and seedsTonifyingArillus Longan

Long Yan Rou (Longan Aril)

A practical guide to Long Yan Rou: 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 NameArillus Longan
Chinese Name & Pinyin 龍眼肉 · Long Yan Rou
Medicinal PartFruits and seeds
The herbLong Yan Rou is the aril of longan. Suan Zao Ren, Da Zao, and Bai Zi Ren are different official drugs.
Nature and channelsSweet, warm. Enters the Heart and Spleen. Sweet warmth tonifies Heart and Spleen and nourishes blood to calm the spirit.
Pharmacopoeia lineTonifies the Heart and Spleen. Nourishes blood and calms the spirit. Used for insufficient qi and blood, palpitations, forgetfulness and insomnia, and blood-deficiency sallow complexion.
Pattern cuesPalpitations. Insomnia and forgetfulness. Blood-deficiency sallow complexion. Pale tongue.
In this articleLong Yan Rou versus Suan Zao Ren, Da Zao, and Bai Zi Ren. Tonifying Heart and Spleen versus astringing sweat to calm the spirit. Why dampness and an exterior pattern should skip it. Who should skip it.

What Is Long Yan Rou?

Long Yan Rou (龙眼肉; Lóng Yǎn Ròu; Latin: Longan Arillus; English: longan aril) is the aril of Dimocarpus longan Lour. In Chinese medicine it is a blood-tonifying herb. It is sweet and warm, enters the Heart and Spleen channels, and its core actions are to tonify the Heart and Spleen, and to nourish blood and calm the spirit. The teaching point is dual Heart–Spleen deficiency: palpitations, insomnia, and forgetfulness from insufficient qi and blood. It is not Suan Zao Ren. Spiny jujube seed is sweet, sour, and neutral. It nourishes the Heart, calms the spirit, and astringes sweat. Tonifying the spleen is not its main work. It is not Da Zao. Chinese date is sweet-warm. It more clearly tonifies the middle and boosts qi. Nourishing blood and calming the spirit are milder. Fresh longan and the dried piece do not share a dose. Damp fullness in the middle, phlegm-fire, and an unresolved exterior pattern are a poor match.

It is used most often for three patterns:

  • Dual Heart–Spleen deficiency — insomnia, forgetfulness
  • Palpitations and fearful throbbing — insufficient qi and blood
  • Blood-deficiency sallow complexion — this needs pattern diagnosis, not a blood-building snack

The usual decoction dose is 9–15 g. Sweet, warm, and moist, it is not a daily “sleep longan” to keep increasing. Phlegm-damp with a greasy coating, and bitter taste with bound stool from phlegm-fire, get more stagnant if more tonification is added.

When Heart and Spleen are insufficient and qi and blood do not nourish the Heart, insomnia, palpitations, and a sallow face are common. Long Yan Rou is sweet-warm. It tonifies, nourishes, and calms the spirit, which is why it appears in Gui Pi Tang. It warms and tonifies more than it moves. Focal distention, poor appetite, and exterior fever get more obstructed if more tonification is added.

Long Yan Rou is not a catch-all blood or sleep fruit. In phlegm-fire, damp obstruction, or an exterior pattern, using it alone can obstruct and assist heat. Whether it belongs in Gui Pi Tang should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.

Long Yan Rou Longan Aril

Long Yan Rou: Materia Medica Profile

Identification & Quality Standard

Arillus Longan

Botanical Origin

The dried aril of Dimocarpus longan Lour.( Sapindaceae)

Production Regions

Primarily produced in the Chinese provinces of Fujian, Guangdong, Guangxi, Yunnan.

Quality Requirements

Superior medicinal material has large piece, thick flesh, soft texture, brownish-yellow color.

Macroscopic Features

Longitudinally split into irregular thin pieces, often has several pieces adhered together, 1.5cm long, 2~4cm wide, 0.1cm thick. Brown, translucent, outer surface is wrinkled and uneven, inner surface is lustrous and with thin longitudinal wrinkles. Soft and moist texture, faintly aromatic odor, sweet taste.

3 Sourcing and Quality Identification

Traditionally, the best quality comes from southern Chinese provinces like Fujian, Guangdong, and Guangxi.

  • High Quality: Look for flesh that is translucent dark brown or yellow-brown. It should be soft, slightly chewy, and have a natural, sweet aroma without any strange smells.
  • Raw vs. Processed: The raw version is lighter in color and chewier, while the processed version is darker, softer, and slightly sweeter.
  • Caution: Beware of fake longan made from similar fruits; these are usually pale, hard, less sweet, and lack the signature soft texture.

Traditional Properties & Historical Lineage

Nature, Flavour & Channel Tropism

Sweet; WarmHeartSpleen

1. 2 Historical Records

This fruit has a long history of praise in classic medical texts:

  • Shen Nong Ben Cao Jing noted its ability to calm the mind and improve appetite.
  • Ben Cao Gang Mu highlighted that it "opens the stomach, benefits the spleen, and boosts intelligence" (by calming the spirit).
  • De Pei Ben Cao recorded its classic pairings: using it with ginseng or astragalus to boost the spleen, or with dates and ophiopogon to nourish the heart.
  • Modern Consensus: Today, its primary accepted functions are tonifying the Heart and Spleen, nourishing the blood, and calming the mind.

2. 3 Evolution of Understanding

Over time, practitioners refined their understanding of this herb. Early doctors focused on its basic digestive and calming benefits. Later, they recognized it as a fantastic gentle tonic for mild, long-term Qi and blood deficiency. However, they also added a crucial warning: people with heavy damp-heat in their spleen and stomach should not eat large amounts of it, as its sweet, moist nature can worsen dampness. Also, the ancient claim of "boosting intelligence" is now understood as improving memory and focus by resolving sleep issues and anxiety, rather than magically increasing IQ.

Long Yan Rou Longan Aril

Core Efficacies & Traditional Applications

Traditional Functions

Supplements heart and spleen, nourishes blood, calms spirit. Apply to deficiency of qi and blood, palpitation and convulsion, amnesia and insomnia, yellow skin due to blood deficiency.

1. 1 First Primary Action: Tonifying the Heart and Spleen

The primary traditional use of Long Yan Rou (Longan Aril) is to nourish the Heart and Spleen, specifically targeting deficiency syndromes in these organs.

  • Common Symptoms: It is often used for palpitations, insomnia, and vivid dreams caused by overthinking, accompanied by poor appetite, fatigue, a sallow complexion, and loose stools.
  • Common Pairings: It is frequently paired with Qi-tonifying herbs like Huang Qi (Astragalus Root) and Dang Shen (Codonopsis Root) to strengthen digestive energy. For sleep support, it is paired with mind-calming herbs like Suan Zao Ren (Sour Jujube Seed) and Bai Zi Ren (Arborvitae Seed).
  • Caution: Individuals with noticeable damp-heat or phlegm-dampness (characterized by a bitter taste in the mouth, a thick tongue coating, and sticky stools) should avoid using it, as its sweet nature can trap and worsen internal dampness.

2. 2 Second Primary Action: Nourishing Blood and Calming the Mind

Long Yan Rou (Longan Aril) is also highly valued for nourishing the blood to calm a restless mind.

  • Common Symptoms: It addresses symptoms like a pale or sallow face, pale lips and nails, light sleep, frequent waking, palpitations, and dizziness caused by blood deficiency.
  • Common Pairings: It is commonly combined with blood-nourishing herbs like Dang Gui (Chinese Angelica Root) and Bai Shao (White Peony Root), or calming herbs like Fu Ling (Poria) and Yuan Zhi (Polygala Root) to settle the mind.
  • Caution: It is not suitable for individuals with "excess heat" (manifesting as canker sores, dry stools, and dark urine), as it may aggravate the heat.

3. 3 Common Single Herb Pairing: The Herb Pair

A classic and effective pairing is Long Yan Rou (Longan Aril) with Suan Zao Ren (Sour Jujube Seed).

  • Synergy: Long Yan Rou provides the necessary foundation by nourishing Qi and blood, while Suan Zao Ren focuses directly on calming the mind and stabilizing palpitations. Together, they create a long-lasting, synergistic effect for treating insomnia and anxiety rooted in deficiency.
  • Note: Because individual constitutions vary, a qualified practitioner should guide the specific dosage and combination.

Long Yan Rou Longan Aril

Modern Research

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

1. 1 Main Chemical Components

Modern science shows that Long Yan Rou (Longan Aril) is rich in polysaccharides, flavonoids, amino acids, and vitamins.

  • Lab tests reveal that its polysaccharides have certain antioxidant properties that help clear free radicals.
  • Animal studies suggest its extracts might mildly regulate the immune system and slightly improve sleep patterns in mice. However, we still lack large-scale human trials to confirm these exact clinical benefits.

2. 2 Modern Pharmacological Directions

Current lab research is mainly focused on exploring how the active compounds (like polysaccharides) offer antioxidant and immune support. Scientists are also looking at how it might influence sleep-related neurotransmitters in animal models to understand its traditional "mind-calming" effects.

3. 3 Limitations of Modern Research

While modern lab tests are interesting, they have limits in TCM:

  • Lab vs. Human: Results from mice or test tubes don't perfectly translate to human digestion and health.
  • Extracts vs. Whole Foods: Labs use highly concentrated, purified extracts, which act very differently from eating the dried whole fruit or drinking it in a tea.
  • Holistic Synergy: TCM relies on the whole plant and complex formulas. Isolating a single chemical compound doesn't reflect how the complete herb interacts with the human body as a whole.

Long Yan Rou Longan Aril

Comparing Similar Herbs

1. 2 Similarities with Comparable Herbs

When comparing Long Yan Rou (Longan Aril) with Dang Shen (Codonopsis Root), both are mild tonics suitable for daily, gentle regulation of Qi and blood deficiencies. Both are commonly used in dietary therapy to address fatigue or poor appetite linked to a weak digestive system.

2. 3 Core Differences

  • Nature and Flavor: Long Yan Rou is neutral, sweet, and highly moistening. Dang Shen is neutral, sweet, but slightly warming, focusing more on boosting Qi rather than moistening.
  • Therapeutic Focus: Long Yan Rou excels at nourishing blood and calming the spirit, making it ideal for sleep issues linked to blood deficiency. Dang Shen is the expert in boosting Spleen and Stomach Qi, making it better for fatigue and poor digestion without severe sleep disturbances.
  • Action Direction: Long Yan Rou has a downward, inward-gathering energy, nourishing essential substances. Dang Shen has an uplifting energy, helping to raise the body's metabolic and digestive functions.
  • Contraindications: Long Yan Rou is contraindicated for damp-heat and excess heat. Dang Shen should be avoided by those with Qi stagnation or acute, excess pathogens (like a severe cold).

3. 4 One-Sentence Summary

Long Yan Rou (Longan Aril) focuses on nourishing blood and calming the mind for better sleep, while Dang Shen (Codonopsis Root) focuses on boosting digestive Qi for better energy; they are both mild tonics but cannot simply replace one another.

Long Yan Rou Longan Aril

Classical Formulas Containing Long Yan Rou

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. 1 Home Tea or Dietary Application

  • Longan, Red Date, and Millet Porridge:
    • Ingredients: 5g Long Yan Rou (Longan Aril), 3 pitted red dates, 50g millet.
    • Method: Wash the millet and boil until half-cooked. Add the longan and dates, and simmer until soft.
    • Best For: Morning use to combat mild fatigue and poor appetite due to weak digestion.
    • Caution: Limit to 2-3 times a week. Avoid if you have heavy damp-heat or excess heat.
  • Longan and Lily Bulb Tea:
    • Ingredients: 3g Long Yan Rou (Longan Aril), 5g Bai He (Lily Bulb).
    • Method: Steep in boiling water for 5 minutes.
    • Best For: Afternoon or evening use (1 hour before bed) to ease mild insomnia and restlessness.

2. 2 Preparation Differences

  • Raw vs. Processed: Processed (steamed) Long Yan Rou is softer, slightly sweeter, and gentler on the digestive system. Raw Long Yan Rou is chewier and less sweet, suitable for everyday mild wellness.
  • Cooking: There are no special cooking rules (like pre-boiling) for this herb. Simply add it to soups or porridges about 5-10 minutes before they finish cooking.
  • Note: Never confuse the dosage of dried herb slices with fresh longan fruit. The dried medicinal version is highly concentrated.

3. 3 Dosage and Usage Cycle

  • Dosage: Traditional clinical doses range from 10-15g. For home dietary use, limit the dose to 3-5g to avoid overwhelming the digestive system.
  • Cycle: Do not consume continuously for more than 2 weeks. For long-term wellness plans, consult a professional. Vulnerable groups (children, elderly, pregnant women) must reduce the dosage and seek guidance.
Long Yan Rou Longan Aril

Contraindications & Safety Warnings

1. 1 Not Suitable For

  • Damp-Heat/Phlegm-Dampness: People with a bitter taste in the mouth, thick tongue coating, sticky stools, or a feeling of chest heaviness should avoid it, as it will worsen internal dampness.
  • Vulnerable Populations: Pregnant and nursing women, children, and the elderly with weak digestion should use it strictly under medical supervision.
  • Medical Conditions: Those with liver/kidney dysfunction or allergies to Sapindaceae (soapberry family) plants must avoid or use extreme caution.

2. 2 Drug Interactions and Dietary Notes

  • Medication Interactions: Because Long Yan Rou may have mild effects on blood circulation and blood sugar, it could potentially interact with blood thinners, blood pressure medications, or diabetes drugs. Always consult your doctor or pharmacist.
  • Herbal Interactions: Combining it with highly warming herbs may create too much "internal heat," while mixing it with very cold herbs might neutralize its benefits. Avoid arbitrary self-mixing.

3. 3 Adverse Reactions and Risks

  • Overconsumption: Taking too much can lead to "internal heat" symptoms, such as dry mouth, bitter taste, dry stools, or canker sores.
  • Emergency Warning: If you experience severe discomfort, allergic reactions (like rash or breathing difficulties), or continuous vomiting, stop taking it immediately and seek emergency medical care. Do not attempt to manage severe reactions at home.

Frequently Asked Questions About Long Yan Rou

What is Long Yan Rou? Are Da Zao, Suan Zao Ren and Yi Zhi Ren the same?
Official Long Yan Rou (龙眼肉) is the dried aril of Dimocarpus longan. The pharmacopoeial name is Longan Arillus; it is also called dried longan flesh. The old alias “yi zhi” is not pharmacopoeial Yi Zhi Ren. Da Zao is sweet-warm: supplements the center, boosts qi, nourishes Blood and calms the spirit. Suan Zao Ren is sweet-sour and neutral: nourishes the Heart, supplements the Liver, calms the spirit, constrains sweat and generates fluid, and must be crushed. Yi Zhi Ren is acrid-warm: warms the Kidney, secures essence, reduces urine, warms the Spleen, stops diarrhea and contains saliva. Write Long Yan Rou. Use caution in phlegm-fire and damp stagnation.
What are the TCM properties and traditional uses of Long Yan Rou?
According to the Chinese Pharmacopoeia, Long Yan Rou is sweet and warm, enters the Heart and Spleen channels, and acts to supplement the Heart and Spleen, nourish Blood and calm the spirit. It is used for qi and Blood insufficiency, palpitations, forgetfulness and insomnia, and sallow complexion from Blood vacuity. Sweet and warm, it suits Heart-Spleen dual vacuity—not internal phlegm-fire, damp stagnation with fullness, or yin-vacuity fire.
Does Long Yan Rou need special processing? Can Da Zao replace it?
Harvest when the fruit is ripe in summer and autumn, dry, remove the shell and seed, and sun-dry until it is no longer sticky. Jujube leans to supplementing the center and boosting qi; it cannot replace supplementing the Heart and Spleen and nourishing Blood to calm the spirit by equal weight. Fresh longan is not equal-weight dried pieces. Commercial longan tea is not equal-weight pieces.
What is the usual dosage? Can it be drunk daily as a calm tea?
The pharmacopoeial decoction dose is 9–15 g. It is not a four-season “longan calm tea.” Phlegm-damp only stagnates further as it supplements. Heart-Spleen dual vacuity needs a practitioner to name a short course; it does not replace sleep and blood assessment.
What are the contraindications? Can it be used in pregnancy?
Unsuitable in internal phlegm-fire, damp stagnation and retained fluid, qi stagnation with fullness, and yin-vacuity fire. Pregnancy needs a practitioner’s assessment; do not take a large warming supplement on your own. Stop if dry mouth, sore throat, abdominal distension or loose stool appears. Palpitations with chest pain are an emergency.
Can Long Yan Rou supplement the Heart and Spleen, nourish Blood and calm the spirit?
It can help palpitations and insomnia from overthinking and taxation damaging the Heart and Spleen. It joins ginseng, astragalus, atractylodes, Chinese angelica, spiny jujube seed, polygala and aucklandia in Gui Pi Tang. It supplements the Heart and Spleen, nourishes Blood and calms the spirit—not a specific for every insomnia or every anemia.
Can Long Yan Rou be drunk daily as a Blood, calm or wit tea?
Heart-Spleen Blood vacuity may enter a short formula; phlegm-fire only heats further as it supplements. “Longan must calm the spirit and boost the wits” does not replace sleep assessment. Supplementing the Heart and Spleen, nourishing Blood and calming the spirit should name 9–15 g.
How do you choose among Long Yan Rou, Da Zao, Suan Zao Ren, Dang Gui and Ren Shen?
Longan aril is sweet-warm: supplements the Heart and Spleen, nourishes Blood and calms the spirit—Heart-Spleen dual vacuity, forgetfulness and insomnia. Jujube is sweet-warm: supplements the center, boosts qi, nourishes Blood and calms the spirit—disharmony of nutritive and defense. Spiny jujube seed is sweet-sour and neutral: nourishes the Heart, supplements the Liver, calms the spirit and constrains sweat—more specific for vacuity vexation and sleeplessness. Chinese angelica is sweet-acrid and warm: supplements Blood, invigorates Blood, regulates the menses and stops pain—Blood vacuity with stasis. Ginseng is sweet, slightly bitter and slightly warm: greatly supplements original qi, restores the pulse, secures collapse, calms the spirit and boosts the wits. Heart-Spleen Blood vacuity favors Long Yan Rou (Gui Pi Tang); nutritive-defense disharmony favors Da Zao; vacuity vexation with night sweat favors Suan Zao Ren; Blood-vacuity dysmenorrhea favors Dang Gui; qi vacuity verging on collapse favors Ren Shen. They may be paired; phlegm-fire and yin-vacuity fire forbid large Long Yan Rou.
Which herbs is Long Yan Rou combined with? What are the representative formulas?
Heart-Spleen dual vacuity joins ginseng, astragalus, atractylodes, Chinese angelica, poria spirit, spiny jujube seed, polygala and aucklandia in Gui Pi Tang. Write Long Yan Rou 9–15 g; do not replace nourishing Blood and calming the spirit with jujube by equal weight.
How do you choose and store Long Yan Rou?
Choose longitudinally split arils, brown and translucent, soft and moist, faintly aromatic and sweet. Moldy, moth-eaten, sour, shell- or seed-containing, or caked lots are discarded. Store ventilated and dry against moisture and moths. Buy pharmacopoeial Long Yan Rou; do not replace supplementing the Heart and Spleen, nourishing Blood and calming the spirit with jujube or alpinia fruit by equal weight.

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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Long Yan Rou (Longan Aril): Tonify the Heart and Spleen and Calm the Spirit