Herb Whole plant / Aerial parts (全草 quán cǎo)

Mo Han Lian

Eclipta · 墨旱莲

Eclipta prostrata (L.) L. · Herba Ecliptae

Also known as: Hàn Lián Cǎo (旱莲草), Eclipta alba, False daisy,

Mo Han Lian (Eclipta) plant

Images shown are for educational purposes only

Eclipta is a gentle herb used to nourish the Liver and Kidneys, making it helpful for premature greying of hair, dizziness, ringing in the ears, and lower back weakness. It also cools the Blood and helps control various types of bleeding such as nosebleeds, heavy periods, and blood in the urine. It is most commonly combined with Nü Zhen Zi (privet fruit) in the classical formula Er Zhi Wan.

Category Yin-tonifying herbs (补阴药) Hemostatic herbs (止血药) Herbs that cool the Blood and stop bleeding (凉血止血药)
Therapeutic focus Hair Health Kidney Health Uterine Bleeding Support Liver Health

TCM Properties

Temperature

Cold

Taste

Sweet (甘 gān), Sour (酸 suān)

Channels entered

Liver, Kidneys

Parts used

Whole plant / Aerial parts (全草 quán cǎo)

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Educational content • Consult qualified TCM practitioners for diagnosis and treatment

What This Herb Does

Every herb has a specific set of actions — here's what Mo Han Lian does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Mo Han Lian is primarily used to support these areas of health:

Hair Health Kidney Health Uterine Bleeding Support Liver Health

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Mo Han Lian performs to restore balance in the body:

Nourishes Liver and Kidney Yin Cools the Blood and Stops Bleeding Darkens the hair and strengthens the teeth Clears Heat from the Blood Level

How these actions work

'Nourishes Liver and Kidney Yin' means this herb replenishes the Yin (the cooling, moistening, and nourishing aspect) of the Liver and Kidney organ systems. When Liver and Kidney Yin becomes depleted, common signs include premature greying of hair, dizziness, tinnitus (ringing in the ears), blurry vision, lower back and knee weakness, and loose teeth. Eclipta is sweet and sour in taste, which gives it a tonifying and astringent quality, and its cold nature helps clear the low-grade heat that often accompanies Yin Deficiency. It is one of the gentler Yin tonics and does not cause the heavy, cloying feeling that richer herbs like prepared Rehmannia can.

'Cools the Blood and stops bleeding' means Eclipta clears excess heat from the Blood level, which in TCM is understood as the underlying driver of many types of abnormal bleeding. When heat enters the Blood, it can force blood out of the vessels, causing nosebleeds, blood in the urine, vomiting blood, heavy menstrual periods, or bleeding gums. Because Eclipta is cold in nature and enters the Liver (which stores Blood), it directly addresses this mechanism. It is especially suited to bleeding caused by Yin Deficiency with internal heat, rather than bleeding from trauma or cold conditions.

'Darkens the hair and strengthens the teeth' reflects the classical understanding that the health of hair and teeth depends on adequate Kidney essence and Liver Blood. When Eclipta nourishes Liver and Kidney Yin, hair quality improves and premature greying can be addressed. The classical name 'Mò Hàn Lián' (ink-like dry lotus) comes from the dark juice that flows when the fresh plant is crushed, and this signature was traditionally associated with its ability to darken hair. For loose teeth, Eclipta's Kidney-nourishing action is key, since TCM holds that the Kidneys govern the bones, and the teeth are considered an extension of bone.

Patterns Addressed

In TCM, symptoms cluster into recognizable patterns of disharmony. Mo Han Lian is used to help correct these specific patterns.

Why Mo Han Lian addresses this pattern

Eclipta directly addresses Liver and Kidney Yin Deficiency through its sweet and sour taste combined with its cold thermal nature. The sweet taste nourishes and tonifies the depleted Yin, while the sour taste has an astringent, consolidating effect that helps retain essence. Its cold nature clears the low-grade Empty Heat that typically accompanies Yin Deficiency. By entering both the Liver and Kidney channels, it replenishes the shared Yin resource of these two organ systems (which are linked through the 'Liver and Kidney share the same source' relationship). This restores the Kidney's ability to produce marrow and nourish bone (addressing loose teeth and weak lower back) and the Liver's capacity to nourish the sinews and hair (addressing premature greying and hair loss).

A practitioner would look for one or more of these signs

Premature Greying of Hair

From Kidney essence and Liver Blood failing to nourish the hair

Tinnitus

Kidney Yin failing to nourish the ears

Dizziness

Yin Deficiency with insufficient nourishment reaching the head

Lower Back Pain

Soreness and weakness of the lower back and knees from Kidney Deficiency

Loose Teeth

Kidney Yin failing to nourish the bones and teeth

Commonly Used For

These are conditions where Mo Han Lian is frequently used — but only when they arise from the specific patterns it addresses, not in all cases

Arises from: Heart and Kidney Yin Deficiency

TCM Interpretation

In TCM, the health and colour of head hair are governed by two systems: the Kidneys, which produce essence (Jing) that manifests externally in the hair, and the Liver, which stores Blood that nourishes the hair. The classical teaching states that 'hair is the surplus of Blood.' When Kidney essence and Liver Blood are abundant, hair is thick, lustrous, and dark. When Liver and Kidney Yin become depleted through ageing, chronic illness, overwork, or constitutional weakness, the hair loses its nourishment and turns grey or white prematurely. This is understood as a deficiency condition rather than a disease of the hair itself.

Why Mo Han Lian Helps

Eclipta directly nourishes Liver and Kidney Yin, replenishing the essence and Blood that are needed to maintain hair colour. Its sour taste has an astringent quality that helps retain and consolidate essence. The classical name 'Mò Hàn Lián' (ink-like lotus) reflects the black juice that flows from the fresh plant, and this darkening property has been associated with its ability to restore hair colour since ancient times. Classical commentators noted that it 'cools blood and benefits blood, so hair turns black.' It is most effective when combined with Nü Zhen Zi (privet fruit) in Er Zhi Wan, which strengthens the Liver-Kidney nourishing effect.

Also commonly used for

Hair Loss

Related to Liver Blood and Kidney essence deficiency

Blood in Urine

Hematuria from Yin Deficiency Heat

Dizziness

From Liver and Kidney Yin Deficiency

Tinnitus

Ringing in the ears from Kidney Yin Deficiency

Loose Teeth

From Kidney deficiency failing to nourish bone

Thrombocytopenia

Low platelet count with bleeding tendency

Dysentery

Bloody dysentery from Damp-Heat in the intestines

Vomiting Blood

Hematemesis from Blood Heat

Herb Properties

Every herb has an inherent temperature, taste, and affinity for specific channels — these properties determine how it interacts with the body

Temperature

Cold

Taste

Sweet (甘 gān), Sour (酸 suān)

Channels Entered

Liver Kidneys

Parts Used

Whole plant / Aerial parts (全草 quán cǎo)

Dosage & Preparation

These are general dosage guidelines for Mo Han Lian — always follow your practitioner's recommendation, as dosages vary based on the formula and your individual condition

Standard dosage

6–12g

Maximum dosage

Up to 30g in decoction for acute bleeding conditions, under practitioner supervision. For fresh herb juice, traditional sources describe using up to 120g (4 liang) of fresh material.

Dosage notes

Use the standard range of 6–12g for nourishing Liver and Kidney Yin (e.g. for premature greying, dizziness, tinnitus). For acute bleeding conditions such as hematemesis, epistaxis, or uterine bleeding, higher doses of 15–30g may be used. When using fresh herb externally for traumatic bleeding, an appropriate amount of the crushed plant is applied directly. Fresh juice taken internally is traditionally prepared from larger quantities (60–120g of fresh herb) pressed and mixed with boiled water. To mitigate its cold impact on the Stomach, classical physicians recommended combining it with ginger juice or Sichuan pepper, particularly for longer-term use.

Preparation

No special decoction handling required. Mo Han Lian is decocted normally with other herbs. Fresh herb can be crushed for juice (internally or externally) or mashed into a poultice for topical application on bleeding wounds.

Processing Methods

In TCM, the same herb can be prepared in different ways to change its effects — here's how processing alters what Mo Han Lian does

Processing method

The dried herb is stir-fried over high heat until the exterior is charred black but the interior retains some original colour (the standard 'charring' method for hemostatic herbs).

How it changes properties

Charring enhances the herb's hemostatic (stop-bleeding) effect while reducing its cold nature somewhat. The astringent quality of the charred form is stronger, making it more effective at physically stopping bleeding. The Yin-nourishing action is somewhat diminished compared to the raw form.

When to use this form

When the primary goal is to stop active bleeding rather than to nourish Yin. Preferred for acute bleeding episodes such as bloody stool, heavy uterine bleeding, or vomiting blood where the bleeding needs to be controlled quickly.

Common Herb Pairs

These ingredients are traditionally combined with Mo Han Lian for enhanced therapeutic effect

Nu Zhen Zi
Nu Zhen Zi 1:1 (equal parts by weight)

This is the most famous pairing for Eclipta, forming the classical formula Er Zhi Wan. Together they powerfully nourish Liver and Kidney Yin without being heavy or cloying. Nü Zhen Zi is sweet, bitter, and cool, complementing Eclipta's sweet, sour, and cold nature. Both enter the Liver and Kidney channels, and their combined effect is a gentle but thorough Yin replenishment that also clears Empty Heat, darkens greying hair, and stabilises bleeding.

When to use: Liver and Kidney Yin Deficiency presenting with premature greying of hair, dizziness, tinnitus, blurred vision, lower back and knee weakness, or heavy menstrual bleeding from Yin Deficiency Heat.

Shu Di Huang
Shu Di Huang 1:1 to 1:2 (Eclipta 10g : Sheng Di Huang 10–20g)

Eclipta nourishes Yin and stops bleeding, while raw Rehmannia (Sheng Di Huang) powerfully clears Heat and cools the Blood while generating fluids. Together they reinforce each other's Blood-cooling and Yin-nourishing effects. Eclipta emphasises Yin nourishment while Sheng Di Huang emphasises clearing Heat, making the pair more comprehensive than either herb alone.

When to use: Blood Heat bleeding with Yin Deficiency, such as vomiting blood, nosebleeds, blood in the urine, or heavy menstrual bleeding accompanied by signs of heat (red tongue, rapid pulse) and Yin depletion (dry throat, night sweats).

Ce Bai Ye
Ce Bai Ye 1:1 (Eclipta 10g : Ce Bai Ye 10g)

Eclipta cools Blood and nourishes Yin, while Ce Bai Ye (Platycladus leaf, often charred) astringes and stops bleeding with a cooling nature. Together they provide a strong hemostatic combination that cools Blood Heat from two angles: Eclipta treats the root (Yin Deficiency) while Ce Bai Ye directly astringes the bleeding.

When to use: Acute or recurrent bleeding from Blood Heat, especially nosebleeds, hemoptysis, or bloody stool.

He Shou Wu
He Shou Wu 1:1 to 1:2 (Eclipta 10g : He Shou Wu 10–20g)

Both herbs nourish the Liver and Kidney and are classically associated with darkening the hair. Prepared He Shou Wu (Zhi He Shou Wu) tonifies Liver Blood and Kidney essence, while Eclipta nourishes Liver and Kidney Yin. Together they address both Blood and Yin aspects of hair nourishment, making the combination more effective for premature greying and hair loss than either herb alone.

When to use: Premature greying, hair loss, or thinning hair from combined Liver Blood and Kidney Yin Deficiency, especially in middle-aged patients showing signs of early ageing.

Key Formulas

These well-known formulas feature Mo Han Lian in a prominent role

Er Zhi Wan 二至丸 King

Er Zhi Wan is the definitive formula showcasing Eclipta's properties. It consists of just two herbs in equal parts: Eclipta (Mo Han Lian) and Nü Zhen Zi (privet fruit). Originally recorded in the Ming dynasty text Fu Shou Jing Fang, it is the most widely used formula for gentle Liver and Kidney Yin nourishment. Eclipta serves as co-King, contributing its Yin-nourishing and Blood-cooling actions. The formula's name 'Two Solstices Pill' refers to the ideal harvest times: Eclipta at the summer solstice and Nü Zhen Zi at the winter solstice.

Comparable Ingredients

These ingredients have overlapping uses — here's how to tell them apart

Nu Zhen Zi
Mo Han Lian vs Nu Zhen Zi

Both nourish Liver and Kidney Yin and enter the same channels, but they have different strengths. Eclipta (cold, sweet, sour) is stronger at cooling Blood and stopping bleeding, making it the better choice when bleeding accompanies Yin Deficiency. Nü Zhen Zi (cool, sweet, bitter) is better at brightening the eyes and clearing Empty Heat, and is slightly milder and less likely to upset the Stomach. When both actions are needed, they are used together as Er Zhi Wan.

Shu Di Huang
Mo Han Lian vs Shu Di Huang

Both are cold and cool the Blood to stop bleeding. However, Sheng Di Huang (raw Rehmannia) is much more powerfully cold and is primarily a Heat-clearing herb, whereas Eclipta is primarily a Yin-nourishing herb that also cools Blood. Sheng Di Huang is better for acute, intense Blood Heat; Eclipta is better when the bleeding arises from chronic Yin Deficiency. Sheng Di Huang can be cloying and harm the Spleen, while Eclipta is lighter and gentler on digestion.

Gui Ban
Mo Han Lian vs Gui Ban

Both nourish Kidney Yin and are cold in nature. Gui Ban (tortoise plastron) is a much heavier, more potent Yin tonic that also anchors Yang, calms the Spirit, and strengthens bones. Eclipta is lighter and milder, better suited as a daily tonic or when bleeding is a concern. Gui Ban is chosen for severe Yin Deficiency with floating Yang or for strengthening bone in conditions like osteoporosis.

Common Substitutes & Adulterants

Related species and common adulterations to be aware of when sourcing Mo Han Lian

Mo Han Lian (墨旱莲) must be carefully distinguished from Hong Han Lian (红旱莲), which refers to the whole plant of Hypericum ascyron L. (Hypericaceae family), a completely different herb with different properties. The Chinese Pharmacopoeia specifically notes this distinction. A common adulterant is Chao Tian Wei Ling Cai (朝天委陵菜, Potentilla supina), which has an upright hollow stem with grey-green or yellow-green surfaces, compound leaves (unlike Mo Han Lian's simple lance-shaped leaves), and small round aggregate fruits. Critically, when soaked in water, this adulterant does NOT produce the characteristic black colour that genuine Mo Han Lian does. Another adulterant is the whole plant of Hypericum sampsonii (元宝草), which has red-brown stems and different fruit morphology. The key authentication test is the black ink test: when genuine Mo Han Lian is rubbed in water, it produces a distinctive black discolouration. No common adulterant replicates this feature.

Educational content — always consult a qualified healthcare provider or TCM practitioner before using any herb.

Toxicity Classification

Classical Chinese pharmacopoeia toxicity rating for Mo Han Lian

Non-toxic

Mo Han Lian is classified as non-toxic in the Chinese Pharmacopoeia and classical texts. The Tang Ben Cao explicitly states it is 'non-toxic' (无毒). No significant toxic components have been identified in modern pharmacological studies. The main clinical concern is not toxicity but rather its cold nature, which can cause abdominal pain and diarrhea in individuals with Spleen and Stomach deficiency cold. Classical physicians such as those in the Ben Cao Jing Shu recommended combining it with ginger juice to prevent gastrointestinal discomfort.

Contraindications

Situations where Mo Han Lian should not be used or requires extra caution

Caution

Spleen and Stomach deficiency cold with loose stools or diarrhea. As noted in the Ben Cao Jing Shu, Mo Han Lian is cold in nature and 'does not benefit the Spleen and Stomach.' Those with weak digestion, poor appetite, or tendency toward loose stools should avoid this herb or use it only with warming modifications such as ginger juice.

Caution

Kidney Yang deficiency. The De Pei Ben Cao specifically prohibits use in Kidney Qi deficiency cold patterns. Mo Han Lian is a purely Yin-nourishing, cold herb and would further damage Yang if used in Yang-deficient patients with symptoms like cold limbs, clear copious urination, or cold low back.

Caution

Bleeding due to Spleen Qi deficiency failing to hold Blood (as opposed to Blood Heat). Mo Han Lian cools Blood and stops bleeding from Heat, but is inappropriate when bleeding results from Qi deficiency failing to contain Blood, as its cold nature would worsen Spleen function.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Generally considered safe at standard doses during pregnancy, but caution is advised. Mo Han Lian's cold nature could potentially affect Spleen and Stomach function. While no specific teratogenic or uterine-stimulating effects have been documented, its Blood-cooling and Blood-moving properties warrant conservative use during pregnancy. Pregnant women with Spleen Yang deficiency or cold constitutions should avoid this herb. Use under practitioner supervision only.

Breastfeeding

No specific contraindications for breastfeeding have been documented in classical or modern sources. Mo Han Lian's cold nature means that excessive doses could theoretically affect the nursing infant's digestion through transfer in breast milk. Breastfeeding mothers with cold constitutions or infants with digestive weakness should use this herb cautiously. Standard doses under practitioner guidance are generally considered acceptable.

Children

Mo Han Lian can be used in children at reduced doses appropriate to age and body weight, typically one-third to one-half of the adult dose. Its cold nature means it should be used cautiously in children with weak digestion or tendency toward loose stools. For external use (fresh herb poultice for bleeding wounds), it is generally well tolerated in children. Not suitable for prolonged unsupervised use in young children due to the risk of Spleen and Stomach impairment from its cold nature.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Mo Han Lian

No well-documented pharmaceutical drug interactions have been established for Mo Han Lian in clinical literature. However, based on its known pharmacological profile, the following theoretical considerations apply:

  • Anticoagulant and antiplatelet medications: Mo Han Lian has demonstrated hemostatic (bleeding-stopping) activity. While this would theoretically oppose anticoagulants like warfarin, the interaction has not been clinically studied. Patients on blood-thinning medications should inform their healthcare provider before using this herb.
  • Hepatically metabolized drugs: Given the herb's hepatoprotective properties and potential effects on liver enzyme activity (through wedelolactone and other coumestans), there is a theoretical possibility of altered drug metabolism, though this has not been confirmed in human studies.
  • Paracetamol (acetaminophen): One preclinical pharmacokinetic study found that wedelolactone did not significantly alter paracetamol bioavailability in rats, and may provide hepatoprotective benefit against paracetamol-induced liver damage.

Dietary Advice

Foods and dietary considerations when taking Mo Han Lian

Because Mo Han Lian is cold in nature, avoid excessive consumption of cold, raw, or icy foods while taking it, especially for individuals with weaker digestion. Warm, easily digestible foods that support the Spleen and Stomach (such as congee, cooked vegetables, and ginger tea) can help counteract the herb's cold nature. Adding a small amount of fresh ginger to meals may be beneficial, as classical sources specifically recommended ginger to prevent the gastrointestinal discomfort that Mo Han Lian's cold nature can cause.

Botanical Description

Physical characteristics and morphology of the Mo Han Lian source plant

Eclipta prostrata (L.) L. is a small annual herb in the Asteraceae (daisy) family, typically growing 10–60 cm tall. The stems are cylindrical with longitudinal ridges, erect or prostrate, and covered with fine white hairs. The leaves are opposite, nearly sessile, lance-shaped with entire or finely toothed margins, and dark green in colour. Small white flower heads (2–6 mm in diameter) appear at the stem tips and leaf axils during summer and autumn.

The plant's most distinctive feature is its dark ink-like juice: when the stem or leaves are broken or rubbed, a black liquid seeps out, giving rise to its Chinese name "ink drought lotus" (墨旱莲). The small fruits are flattened, elliptical achenes resembling tiny lotus seed pods, which accounts for the "lotus" (莲) in the name. It grows readily in moist environments such as stream banks, field edges, ditches, and roadsides, and is found throughout tropical and subtropical regions worldwide.

Sourcing & Harvesting

Where Mo Han Lian is sourced, when it's harvested or collected, and how to assess quality

Harvesting season

Summer to autumn, harvested when the flowers are in bloom, then sun-dried.

Primary growing regions

Mo Han Lian is distributed throughout all provinces of China, growing wild in moist habitats along rivers, ditches, field borders, and roadsides. The primary commercial production regions are Jiangsu, Zhejiang, Jiangxi, and Hubei provinces. Southern China generally produces more abundant wild harvests due to the plant's preference for warm, humid environments. It is also widely distributed in tropical and subtropical regions globally, including India, Southeast Asia, Brazil, and parts of Africa.

Quality indicators

Good quality dried Mo Han Lian should be dark green (墨绿色) in colour, with intact stems and leaves. The stems should be greenish-brown or dark green with visible longitudinal ridges. When the herb is soaked in water and the stems and leaves are rubbed, they should produce a distinctive black colour, confirming authenticity. The taste should be mildly salty (味微咸) with a faint aroma. Look for specimens with visible small white flower heads or small dark-coloured fruit clusters. Avoid material that is yellowed, mouldy, heavily fragmented, or mixed with excessive roots and soil. The best quality is described classically as 'green in colour, free of impurities' (以色绿、无杂质者为佳).

Classical Texts

Key passages from the classical Chinese medical texts that describe Mo Han Lian and its therapeutic uses

Tang Ben Cao (《唐本草》, Tang Dynasty)

Chinese: 主血痢。针灸疮发，洪血不可止者敷之；汁涂发眉，生速而繁。

English: Treats bloody dysentery. For acupuncture or moxibustion sores that bleed profusely and cannot be stopped, apply it topically. Applying the juice to the hair and eyebrows promotes rapid and abundant growth.

Ben Cao Jing Shu (《本草经疏》, Ming Dynasty)

Chinese: 鳢肠善凉血。须发白者，血热也，齿不固者，肾虚有热也；凉血益血，则须发变黑，而齿亦因之而固矣。故古今变白之草，当以兹为胜。

English: Eclipta excels at cooling the Blood. White hair and beard indicate Blood Heat; loose teeth indicate Kidney deficiency with Heat. By cooling and nourishing the Blood, hair and beard turn black, and teeth are thereby strengthened. Thus, among all herbs ancient and modern for reversing grey hair, this one is the finest.

Ben Cao Jing Shu (《本草经疏》, caution passage)

Chinese: 鳢肠性冷，阴寒之质，虽善凉血，不益脾胃。病人虽有血热，一见脾胃虚败，饮食难消，及易溏薄作泄者，勿轻与服。

English: Eclipta is cold in nature, a substance of Yin and cold. Although it excels at cooling Blood, it does not benefit the Spleen and Stomach. Even if a patient has Blood Heat, once there is Spleen and Stomach weakness with poor digestion or tendency toward loose stools and diarrhea, do not lightly prescribe it.

Ben Cao Zheng Yi (《本草正义》)

Chinese: 鳢肠，入肾补阴而生长毛发，又能入血，为凉血止血之品，又消热病痈肿。但纯阴用事，非阳盛之体，不应多用，脾虚泄泻尤忌。

English: Eclipta enters the Kidney to nourish Yin and promote hair growth. It also enters the Blood level as a substance that cools Blood and stops bleeding, and disperses hot swellings and abscesses. However, it acts through pure Yin, and should not be used liberally unless the constitution has excess Yang. It is especially contraindicated in Spleen deficiency with diarrhea.

Ben Cao Meng Quan (《本草蒙筌》, Ming Dynasty)

Chinese: 味甘、酸，气平。无毒。染白发回乌，止赤痢变粪。须眉稀少，可望速生而繁。

English: Sweet and sour in flavour, neutral in Qi nature. Non-toxic. Dyes white hair back to black, stops red dysentery. For sparse hair and eyebrows, one can hope for swift and abundant regrowth.

Historical Context

The history and evolution of Mo Han Lian's use in Chinese medicine over the centuries

Mo Han Lian's original name was Jin Ling Cao (金陵草), first appearing in Sun Simiao's Qian Jin Yue Ling (《千金·月令》) during the Tang Dynasty, where it was noted to "benefit the beard and hair, turning white to black." The Tang Xin Xiu Ben Cao (《新修本草》, also known as the Tang Ben Cao) formally renamed it Li Chang (鳢肠, literally "snakehead fish intestine") and recorded its ability to treat bloody dysentery and promote hair growth. The name "Li" refers to the black snakehead fish, an allusion to the inky black juice that oozes from the broken stems.

Li Shizhen explained the etymology in the Ben Cao Gang Mu: the soft stems exude ink-like juice when snapped, hence the folk name "ink vegetable" (墨菜), while the small fruits resemble miniature lotus pods, giving rise to the "lotus" (莲) in the name. The herb has been a cornerstone of hair-darkening remedies throughout Chinese medical history. Its most celebrated formula pairing is Er Zhi Wan (二至丸, "Pill of the Two Solstices"), recorded in Wang Ang's Yi Fang Ji Jie (《医方集解》), which combines Mo Han Lian (harvested at the summer solstice) with Nu Zhen Zi (女贞子, harvested at the winter solstice) to nourish Liver and Kidney Yin. This elegant pairing reflects the classical principle of harvesting herbs at the peak of their seasonal Qi.

In Ayurvedic medicine, the same plant (known as Bhringaraj) has a parallel history as a premier rejuvenating herb for the liver and hair, illustrating the cross-cultural recognition of its therapeutic properties.

Modern Research

4 published studies investigating the pharmacological effects or clinical outcomes of Mo Han Lian

1

Comprehensive review on traditional uses, phytochemistry and pharmacology of Eclipta prostrata (2019)

Feng L, Zhai YY, Xu J, Yao WF, Cao YD, Cheng FF, Bao BH, Zhang L. Journal of Ethnopharmacology, 2019, 245, 112109.

A major review covering both Chinese and English research on Mo Han Lian. The study catalogued over 70 chemical compounds including coumestans (wedelolactone, demethylwedelolactone), flavonoids (luteolin, apigenin), triterpenoid saponins, and thiophene derivatives. It confirmed pharmacological support for traditional uses including hepatoprotective, hemostatic, anti-inflammatory, anti-osteoporotic, and hair growth-promoting activities, while also noting emerging potential in cancer, dementia, and diabetes research.

Link
2

Hepatoprotective effect of wedelolactone against Concanavalin A-induced liver injury in mice (2018)

Luo Q, Ding J, Zhu L, Chen F, Xu L. American Journal of Chinese Medicine, 2018, 46(4), 819-833.

This preclinical study investigated wedelolactone, a key coumestan compound from Mo Han Lian, in a mouse model of immune-mediated liver injury. Pretreatment with wedelolactone significantly reduced serum transaminase levels and liver damage severity. The mechanism involved attenuation of pro-inflammatory cytokines (TNF-alpha, IFN-gamma, IL-6) and inhibition of NF-kappaB signaling, supporting the traditional use of Mo Han Lian for liver diseases.

Link
3

Eclipta prostrata ethnomedicinal uses, chemical constituents, and biological activities (review, 2021)

Devkota HP, Joshi KR. Biomolecules, 2021, 11(11), 1738.

A systematic review that compiled information on the phytochemistry and biological activities of Eclipta prostrata from multiple databases. It identified coumestan derivatives, phenolic acid derivatives, flavonoids, triterpenoid and steroid saponins, and substituted thiophenes as the major bioactive compound classes. The review confirmed antimicrobial, anticancer, hepatoprotective, neuroprotective, and hair growth-promoting activities, while noting that most studies are preclinical and properly designed clinical trials are needed.

Link
4

Integrated spatial metabolomics and transcriptomics decipher the hepatoprotection mechanisms of wedelolactone and demethylwedelolactone on NAFLD (2024)

Published in Journal of Pharmaceutical and Biomedical Analysis / related journal, 2024.

Using a zebrafish model of liver injury, this study employed cutting-edge spatial metabolomics and transcriptomics to compare the hepatoprotective mechanisms of wedelolactone and demethylwedelolactone, the two signature coumestans of Mo Han Lian. Both compounds significantly improved liver function and reduced fat accumulation, but through distinct mechanisms: wedelolactone primarily modulated steroid biosynthesis and fatty acid metabolism pathways, while demethylwedelolactone acted through different routes.

PubMed

Research on individual TCM herbs is growing but still limited by Western clinical trial standards. These studies provide emerging evidence and should be considered alongside practitioner expertise.