Fruits and seedsPhlegm-resolvingSiraitiae Fructus

Luo Han Guo (Lohanguo Siraitia Fruit)

A practical guide to Luo Han Guo: 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 29, 2026

Quick Facts

Latin Name	Siraitiae Fructus
Chinese Name & Pinyin	羅漢果 · Luo Han Guo
Medicinal Part	Fruits and seeds
The item	Luo Han Guo is the dried ripe fruit of the monk-fruit vine. Yu Zhu (solomon's seal) and the gourd-family look-alike fruits are not this drug.
Nature and channels	Flat, sweet. Enters the Lung and Large Intestine. Flat sweet clears the throat, soothes the cough, and moistens the bowels.
Pharmacopoeia line	Clears heat and moistens the lung; soothes the throat; moistens the bowels. Used for dry throat, cough, and constipation.
Pattern cues	Dry scratchy throat. Hoarse voice. Light cough. Dry, hard stools. Difficult passage. No marked fever.
In this article	Luo Han Guo versus Yu Zhu. Clearing the throat and moistening the bowels versus nourishing yin and generating fluids. Why cold-weak spleens should skip it. Home tea.

What Is Luo Han Guo?

Luo Han Guo (罗汉果; Luó Hàn Guǒ; Latin: Siraitiae Fructus; English: monk fruit) is the dried ripe fruit of the monk-fruit vine, a gourd-family climber of the southern mountains — the round, light-brown fruit that floats in warm water and steadies a scratchy autumn throat. It is flat, sweet, enters the Lung and Large Intestine channels, and its core actions are to clear and soothe the throat, and to moisten the bowels. It is the gentle fruit for a dry throat and dry stools. The usual amount is 9–15 g in a decoction, or about 1/4–1/2 fruit per cup as a tea. Steep it in boiling water or simmer 15 minutes — no special first, last, or wrapped step. It is a medicinal piece, not a snack to overeat.

It is not Yu Zhu. Solomon's seal is slightly cold and sweet — it nourishes yin and moistens dryness, better for whole-body dryness — dry mouth, dry cough with little sputum; this monk fruit is flat and sweet — it clears the throat and moistens the bowels, better for a dry scratchy throat and dry stools. It is not a strong herb; it works lightly. In cold-weak spleen-stomach with frequent diarrhea, or in damp-heat constipation, using it on your own is a poor match. Persistent cough or severe constipation needs a clinic first. Do not take it yourself for a long time.

It is used most often for three patterns:

Lung-heat dryness of the throat — dry scratchy throat, hoarse voice, light cough, no marked fever or chills — after much talking or in dry air
Large-intestine fluid insufficiency — dry, hard stools, difficult passage, without marked bloating or pain — often in older age or after spicy diets
Cold-weak spleen-stomach with frequent diarrhea, or damp-heat constipation with a thick greasy coat — seek care / skip it

Flat, sweet, and moist, it is not a daily "throat-and-gut fruit tea" to keep drinking. Moistening when there is no dryness, or in a cold-damp body, adds damp instead of helping.

When dry air, much talking, and spicy food drain the fluids of the lung and the large intestine — the throat scratches, the voice roughens, the stools turn dry — the body needs a gentle moisten-and-settle rather than a strong change. Luo Han Guo is flat and sweet. It clears the throat, eases the cough, and moistens the bowels, which is why it appears in Luo Han Guo Tang Cha (Monk Fruit Tea)–type formulas. It moistens more than it forces. In cold-weak spleen-stomach, or in damp-heat, more makes it worse.

Luo Han Guo is not a catch-all throat or gut fruit. In cold-weak spleen-stomach, in damp-heat, or without dryness, using it alone is a poor match. Whether it belongs in a formula, and at what dose, should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.

Luo Han Guo: Materia Medica Profile

Identification & Quality Standard

Siraitiae Fructus

Botanical Origin

The dried mature fruit of Siraitia grosvenorii (Swingle) C. Jeffrey ex Lu et Z. Y. Zhang.(Cucurbitaceae)

Production Regions

Primarily produced in Yongfu county near Guilin in China's Guangxi province.

Quality Requirements

Superior medicinal material is classified by widest perimeter, extra-large fruit (perimeter more than 18cm), large fruit (17.4~18cm), medium fruit (16.5~17.4cm), small fruit (14.1~15.5cm), the higher the class the better the quality.

Macroscopic Features

Oval, elliptical or spherical shape. Externally brown, yellowish-brown or greenish brown, with dark color spots and yellow soft hairs, some have 6~11 longitudinal lines. Apex has remnants of style. Base has scars of fruit stem. Light, brittle texture, easily broken. Flesh (mesocarp) is sponge-like, pale brown. Seed is flat spherical, numerous, pale red to brownish-red, center of both sides is slightly indented. All sides have a radial grooved pattern, edge has grooves. faint odor, sweet taste.

Main Regions and Quality Identification

Classic texts and trade experience favor fruit from a celebrated growing region in the south, but quality still depends on variety, harvest time, processing, and storage. Good Luo Han Guo is round or oblong, yellow-brown on the surface with fine longitudinal texture, light and brittle, silent when shaken, with light-brown dry, loose pulp inside, a faint fragrant smell, and a sweet, not bitter, taste. The common look-alikes are other gourd-family fruits of similar shape — heavier, with coarser skin, a faint or off smell, and clearly less sweetness — so check carefully.

Traditional Properties & Historical Lineage

Nature, Flavour & Channel Tropism

Sweet; CoolLungLarge Intestine

1. Records in Classic Materia Medica

Ling Nan Cai Yao Lu: "regulates phlegm-fire cough; decoct with pork for drinking."
A provincial Chinese medicine record: "relieves cough, clears heat, cools the blood, and moistens the bowels."

These records center on the clearing and moistening actions — no modern efficacy conclusions.

2. How Views of Its Nature Changed

Some southern doctors leaned on clearing the throat and easing the cough — for lung-heat dryness cough; others stressed the bowel-moistening — for constipation from large-intestine fluid deficiency; some drew the line — long single use in a cold-weak spleen-stomach may bring stomach discomfort. The refinement keeps the fruit from being taken as a catch-all.

Core Efficacies & Traditional Applications

Traditional Functions

Clears heat and moistens the lung, soothes the throat and restores voice, and lubricates the intestines to relax bowels.

1. Main Use 1: Clearing and Soothing the Throat

(1) Traditional action: clearing the throat and easing dryness, pain, or hoarseness. (2) Typical patterns: lung-heat dryness of the throat — a dry scratchy throat, light pain, hoarse voice, without marked chills or fever — often after much talking or in dry air. (3) Usual pairings: Yu Zhu and Mai Dong to strengthen the moistening. (4) Not for self-use: throat discomfort from wind-cold, or cold-weak spleen-stomach with frequent diarrhea.

2. Main Use 2: Moistening the Bowels

(1) Traditional action: moistening the bowels and easing constipation from large-intestine fluid deficiency. (2) Typical patterns: dry, hard stools and difficult passage — often in older age, after childbirth, or after long spicy diets — without marked bloating or pain. (3) Usual pairings: Huo Ma Ren (hemp seed) and Sheng Di Huang (raw rehmannia) to strengthen the moistening. (4) Not for self-use: constipation from damp-heat stagnation — thick greasy coat, marked bad breath.

3. A Classic Pairing

Luo Han Guo pairs classically with Yu Zhu: the fruit clears the throat and moistens the bowels; the solomon's seal nourishes the yin, moistens dryness, and generates fluids — together they strengthen the moistening for the pattern of both lung-fluid and large-intestine-fluid deficiency — a scratchy throat with dry stools. This pair belongs to a practitioner's pattern diagnosis — no casual self-pairing.

Modern Research

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

1. Main Chemical Constituents

Detected in the fruit are mogrosides — the sweet constituents — plus flavonoids and polysaccharides. In vitro, mogrosides show antioxidant activity; in animals, mice fed the extract show some relief of cough. No sufficient human clinical study yet proves a clear effect on human cough or bowel problems.

2. Current Research Directions

Current work centers on the antioxidant activity and regulation of gut flora — in vitro, the polysaccharides appear to promote the growth of certain beneficial gut bacteria. The studies mostly center on the mogroside metabolism pathways; human studies on the real effects in people are still needed.

3. Limitations of Current Research

Lab results are not clinical efficacy — component effects may differ from the piece's effect in people.
Extracts are not decoction pieces — the mogroside extract dose differs greatly from the daily steeped-fruit dose.
Doses and preparations vary between studies — the reference value is limited.
One component does not define the whole herb — the fruit acts as a team of constituents.

Comparing Similar Herbs

1. What They Share

Both moisten dryness.
Both are used for dry-throat discomfort.
Both appear in daily teas and food-remedy scenes.
Both need constitution and dose care.

2. Key Differences

Nature and flavor: Luo Han Guo is flat and sweet — level, neither cold nor hot; Yu Zhu is slightly cold and sweet — leaning cool. Both are sweet, but Yu Zhu's slight cold is gentler in a different direction. Focus: Luo Han Guo clears the throat and moistens the bowels — centered on local dry-heat of the throat and bowel-fluid deficiency; Yu Zhu nourishes the yin, moistens dryness, and generates fluids — centered on the lung-stomach fluids, easing whole-body dryness — dry mouth, dry cough. Tendency: Luo Han Guo leans to clearing and descending — clearing the lung dryness downward and moistening the bowel fluids down; Yu Zhu leans to nourishing — supplementing the lung-stomach fluids without a marked clearing-descending side. Best fit: Luo Han Guo for a dry scratchy throat and dry stools — without marked chills or fever; Yu Zhu for dry mouth and throat, dry cough with little sputum — possibly with a slight restless-heat feeling. Who should avoid: Luo Han Guo — cold-weak spleen-stomach with frequent diarrhea, and damp-heat constipation; Yu Zhu — phlegm-damp with a thick greasy coat, and cold-weak spleen-stomach with poor appetite. Where you meet them: Luo Han Guo in everyday throat care and short-term bowel care — the tea after much talking; Yu Zhu in long-term fluid-deficiency care and formulas — with partners for dry mouth and dry cough.

3. One-Line Takeaway

In short, Luo Han Guo clears the throat and moistens the bowels; Yu Zhu nourishes the yin, moistens dryness, and generates fluids. Both can serve dryness — but they are not stand-ins for each other.

Classical Formulas Containing Luo Han Guo

Classic Formula 1: Luo Han Guo Tang Cha

Role of this herb: in Luo Han Guo Tang Cha (Monk Fruit Sugar Tea), Luo Han Guo is the monarch — used alone or with a little green tea — clearing the lung fluids and moistening the large-intestine fluids; the green tea's light, clear nature guides the action upward to strengthen the throat clearing. Alone, the fruit's effect is relatively single; the green tea lifts the clearing. Traditional focus: lung dryness cough, dry sore throat, dry stools. Modern note: professional diagnosis first — never self-apply by the name to a modern complaint.

Classic Formula 2: Luo Han Guo Xing Ren Tang

Role of this herb: in Luo Han Guo Xing Ren Tang (Monk Fruit and Apricot Seed Decoction), Luo Han Guo is a minister — with Xing Ren (bitter apricot seed) descending the qi and easing the cough, and Sang Bai Pi (mulberry root bark) clearing the lung heat — together the trio sorts the lung and large-intestine qi. Alone, the fruit cannot cover the cough-easing that the apricot seed and mulberry bark bring. Traditional focus: lung dryness cough with scanty sticky sputum, dry throat, dry stools. Modern note: professional diagnosis first — never self-apply by the name.

Formula vs. Single Herb

A formula is a coordinated team — the monarch-minister pairings form the whole effect, and the doses are tuned to the pattern; a single herb cannot copy a full formula's effect. A herb that works in a formula does not automatically work the same way alone — web articles often skip the diagnosis and dose-tuning. Do not self-formulate.

Diet & Daily Home Use

1. Home Tea

Example 1 — Luo Han Guo clearing-moistening tea: Luo Han Guo 1/4 fruit, Yu Zhu 3 g, Mai Dong 3 g — steep in boiling water, cover 10 minutes. Fit: dry autumn-winter seasons or a scratchy throat after much talking. Not for: cold-weak spleen-stomach with frequent diarrhea, or phlegm-damp with a thick greasy coat. Frequency: 2–3 times a week, one cup each. Example 2 — Luo Han Guo bowel-moistening drink: Luo Han Guo 1/2 fruit, Huo Ma Ren 3 g — simmer in 500 ml water 15 minutes, strain and drink. Fit: short-term dry, hard stools with difficult passage. Not for: damp-heat constipation, or pregnancy. Frequency: 1–2 times a week, no more than 3 days straight.

2. Decoction and Processing Differences

The raw fruit is harder and needs steeping or simmering to release the constituents — no special first or last step; the stir-fried form is looser, releases faster, and is slightly sweeter, fitting cases that need a stronger moistening. At home, put the piece in a pot, soak 30 minutes in water, bring to a boil, then simmer 15 minutes. Different forms cannot be converted directly — a piece dose is not an extract dose; do not substitute an extract for the piece.

3. Dosage and How Long to Use

The classic range is 9–15 g, usually as a paired herb in formulas; food-use amounts are 1/4–1/2 fruit, adjusted to the situation. No long continuous use — the fruit is flat, but long use may affect the spleen-stomach. Special populations — pregnancy, children, liver or kidney impairment — consult a professional before use.

Contraindications & Safety Warnings

1. Who Should Avoid It

Cold-weak spleen-stomach with frequent diarrhea — the fruit may loosen the stools further; pregnancy and nursing — safety data are limited, avoid self-use; children and the elderly — weaker bodies, consult a practitioner before use; liver or kidney impairment — avoid self-use; allergy to the gourd family — the fruit may trigger it; people on anticoagulant or blood-pressure medicines — avoid self-use.

2. Interactions and Diet Notes

Luo Han Guo may interact with blood-pressure medicines and affect blood-pressure stability, with blood-sugar medicines and affect blood-sugar control, and with sedatives and deepen drowsiness. No blanket "food clash" with ordinary foods is established, but herbs can interact with specific medicines — consult a doctor or pharmacist first; no need to worry about normal everyday food pairings.

3. Side Effects and Overuse

Overuse can bring stomach discomfort and light diarrhea — especially for cold-weak spleens; allergic bodies may show rash and itching. Stop and seek care at once for marked discomfort, an allergic reaction, persistent vomiting, trouble breathing, confusion, or a rapid worsening of symptoms.

Frequently Asked Questions About Luo Han Guo

What is Luohanguo? Is it the same as Pangdahai or Maidong?

Luohanguo is the dried fruit of Siraitia grosvenorii, Latin name Siraitiae Fructus. It is a common Chinese medicine centered on clearing heat and moistening the lung, benefiting the throat and opening the voice, and moistening the intestines and freeing the bowels. Pangdahai clears heat and moistens the lung while benefiting the throat. Maidong nourishes yin and moistens the lung while generating fluids. They cannot be used interchangeably in equal amounts. Prescribe as Luohanguo. Caution in spleen-stomach deficiency cold.

What are the composition and effects of Luohanguo?

Pharmacopoeial name Luohanguo, Latin Siraitia grosvenorii (Swingle) C. Jeffrey ex A. M. Lu et Z. Y. Zhang. Sweet in taste, cool in nature, enters the Lung and Large Intestine meridians. Functions to clear heat and moisten the lung, benefit the throat and open the voice, and moisten the intestines and free the bowels. Used for lung heat dry cough, sore throat with loss of voice, and intestinal dryness constipation. Moistens the lung and benefits the throat.

How to choose between raw and processed? Can Pangdahai replace it?

Fruit is used raw. Pangdahai emphasizes benefiting the throat rather than strongly moistening the intestines, and cannot replace it in equal amounts. Commercial products are standardized; do not adjust arbitrarily.

What is the dosage of Luohanguo? Can it be used daily as a lung-moistening tea?

Decoction, 9-15g. Modern use requires physician-determined dosage. It is not a year-round "Luohanguo tea." Spleen-stomach deficiency cold will be further injured by prolonged use. Sore throat requires short-term, physician-determined dosage and cannot replace evaluation.

What are the contraindications of Luohanguo? Can pregnant women use it?

Not suitable for spleen-stomach deficiency cold. Pregnant women require physician evaluation. Stop if loose stools or abdominal pain occur. Seek immediate medical care for severe sore throat or high fever.

Can Luohanguo clear heat, moisten the lung, and benefit the throat?

It can assist lung heat dry cough, sore throat with loss of voice, and intestinal dryness constipation. It clears heat and moistens the lung, benefits the throat and opens the voice, and moistens the intestines and frees the bowels, but is not a specific remedy for all sore throat or all constipation.

Can Luohanguo be taken daily as a lung-moistening or throat-benefiting tea?

Lung heat dry cough can be used short-term in formulas; spleen-stomach deficiency cold will be further injured. The idea that "Luohanguo must moisten the lung" cannot replace evaluation. Clearing heat and moistening the lung requires physician-determined formulation and dosage.

How to choose between Luohanguo, Pangdahai, Maidong, Chuanbeimu, and Gancao?

Luohanguo clears heat and benefits the throat, suited to sore throat. Pangdahai clears heat and benefits the throat. Maidong nourishes yin and generates fluids. Chuanbeimu clears heat and transforms phlegm. Gancao tonifies the spleen and boosts qi while moistening the lung. Choose Luohanguo for moistening the lung; Pangdahai for benefiting the throat; Maidong for generating fluids; Chuanbeimu for transforming phlegm; Gancao for boosting qi. Pattern differentiation applies, but large doses of Luohanguo are contraindicated in spleen-stomach deficiency cold.

How is Luohanguo commonly modified? What is a representative usage?

Modifications depend on the pattern. Add Pangdahai for sore throat; add Maidong for dry cough. Specify Luohanguo; do not substitute Pangdahai in equal amounts for moistening the intestines.

How to select and store Luohanguo?

Choose regular Chinese medicinal materials with intact fruits. Discard if moldy, damp, or abnormal in odor. Store in a dry place. Purchase "Luohanguo"; do not substitute Pangdahai or Maidong in equal amounts for clearing heat, moistening the lung, and benefiting the throat.

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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.