Herbal Monograph
Cleavers
Galium aparine L.
Rubiaceae (Madder family)
The quintessential lymphatic herb for healthy drainage, cleansing, and tissue...
Overview
Plant Description
Cleavers is a vigorous annual or overwintering herbaceous plant with a scrambling, climbing growth habit, growing 30-120 cm (12-48 inches) or more in length. The stems are square (quadrangular) in cross-section, weak and straggling, with downward-pointing hooked trichomes (tiny hook-shaped hairs) along the stem angles that enable the plant to cling to adjacent vegetation and surfaces -- hence the common name 'cleavers.' Leaves are arranged in whorls of 6-8, narrowly oblanceolate, 1-5 cm long, with a single vein and recurved prickles on the margins and midrib. Small white or greenish-white flowers (1-3 mm diameter) are borne in axillary cymes of 2-5 flowers. The fruit is a globular schizocarp (1-4 mm), densely covered with hooked bristles that aid in seed dispersal by clinging to animal fur and clothing. The entire plant has a slightly rough, clinging texture. Roots are thin and fibrous. The plant is best used fresh, as much of its therapeutic potency is considered to diminish with drying.
Habitat
Cleavers thrives in moist, nitrogen-rich soils in partial shade to full sun. It is commonly found in hedgerows, woodland edges, waste ground, gardens, arable fields, riverbanks, and disturbed habitats. It is one of the most common weeds of cultivated and disturbed ground throughout temperate regions. Prefers moderately fertile, well-drained to moist soils with a neutral to slightly alkaline pH (6.0-7.5). A nitrophilous species, its abundance is often an indicator of nitrogen-rich soil.
Distribution
Native to Europe, western Asia, and northern Africa. Widely naturalized throughout North America, Australia, New Zealand, South America, and most temperate regions worldwide. Considered an invasive weed in many agricultural systems. Distributed across the entire British Isles and throughout continental Europe from Scandinavia to the Mediterranean. In North America, found from Alaska to Mexico in diverse habitats.
Parts Used
Aerial parts (Herba Galii aparinis -- stems, leaves, flowers)
Preferred: Fresh-pressed juice (succus); fresh plant tincture; cold infusion of fresh herb; dried herb for infusion (less preferred)
The entire above-ground portion is used medicinally. The BHP (British Herbal Pharmacopoeia) specifies the dried aerial parts. However, the fresh plant is strongly preferred by most Western herbalists for optimal therapeutic effect, particularly for lymphatic indications. The fresh-pressed juice (succus) is considered the most potent preparation. The aerial parts contain the full spectrum of iridoid glycosides, flavonoids, phenolic acids, and other active constituents.
Key Constituents
Iridoid glycosides
Iridoid glycosides are considered the principal pharmacologically active compounds in cleavers. Asperuloside and monotropein together provide the anti-inflammatory foundation that supports the herb's traditional use for swollen lymph nodes and inflammatory conditions. These compounds are best extracted by fresh juice or hydroethanolic preparations. Iridoids are somewhat unstable and degrade with prolonged drying, which partially explains the traditional preference for fresh plant preparations.
Phenolic acids
Phenolic acids contribute significantly to the antioxidant and anti-inflammatory actions of cleavers. Chlorogenic acid is one of the most abundant phenolic compounds and supports both the diuretic and hepatoprotective effects. The combined phenolic acid profile provides free radical scavenging activity relevant to tissue protection during inflammatory processes, particularly in lymphatic congestion.
Flavonoids
Flavonoids in cleavers support the anti-inflammatory and antioxidant actions. Rutin's capillary-strengthening properties may be particularly relevant to lymphatic system support, helping to maintain vessel integrity and reduce edema. The combined flavonoid profile contributes to tissue protection during inflammatory and congestive lymphatic conditions.
Coumarins
Coumarins contribute to the mild antispasmodic and anti-inflammatory profile of cleavers. Their presence is characteristic of many Rubiaceae species. Simple coumarins in cleavers are structurally distinct from anticoagulant dicoumarol derivatives.
Tannins
Tannins underpin the astringent action of cleavers, contributing to its ability to tone lax lymphatic tissue and reduce excessive secretions. This is relevant to the traditional indication for swollen, boggy lymph nodes and edematous conditions. The combination of astringent tannins with anti-inflammatory iridoids creates a complementary therapeutic profile for lymphatic congestion.
Organic acids
Organic acids contribute to the mild diuretic effect of cleavers by promoting urinary alkalinization and fluid output. Citric acid in particular supports the traditional use of fresh cleavers juice as a spring tonic and cleansing agent.
Anthraquinones
Anthraquinones are present only in trace amounts in cleavers and are not considered therapeutically significant at typical doses. They are mentioned for completeness as characteristic Rubiaceae phytochemicals. The very low concentration distinguishes cleavers from strongly laxative anthraquinone-containing plants (senna, cascara).
Alkanes and fatty acids
Minor component class with limited direct therapeutic relevance. Included for completeness of the phytochemical profile.
Herbal Actions
Gradually restores proper body function and increases overall health
Cleavers is one of the foremost alterative herbs in the Western herbal tradition. The alterative action refers to the herb's ability to gradually improve tissue function and promote efficient waste removal, particularly through the lymphatic system. By enhancing lymphatic drainage and filtration, cleavers supports the body's natural detoxification pathways. The BHP lists cleavers specifically as an alterative with affinity for the lymphatic system. This action is the cornerstone of its use as a spring cleansing herb and its application in chronic skin conditions, swollen glands, and tissue congestion. The iridoid glycosides (asperuloside, monotropein) and phenolic acids are considered the primary mediators of this action.
[1, 2, 3]Increases urine production and output
Cleavers is a reliable and gentle diuretic, increasing urine volume without the harshness of pharmaceutical diuretics. The diuretic action supports its alterative function by providing a secondary route of waste elimination via the kidneys. The BHP specifically lists dysuria as an indication. The mechanism is thought to involve flavonoids, citric acid, and chlorogenic acid acting on renal tubular function to promote sodium and water excretion. Historically described by Culpeper and Gerard as effective for urinary complaints. The diuretic effect is gentle enough for long-term use and is considered 'amphoteric' by some herbalists -- tonifying the urinary tract while promoting fluid output.
[1, 2, 13]Reduces inflammation
Cleavers demonstrates anti-inflammatory activity mediated primarily through its iridoid glycosides (asperuloside and monotropein), which inhibit prostaglandin synthesis and NF-kB signaling. Phenolic acids (chlorogenic acid, gallic acid) and flavonoids (luteolin, quercetin) provide additional anti-inflammatory support. This action is relevant to its use for inflamed lymph nodes, urinary tract inflammation, and skin conditions. In-vitro studies on Galium aparine extracts have demonstrated inhibition of pro-inflammatory mediators.
[2, 5, 6]Tightens and tones tissue, reduces secretions
The tannin content provides a mild astringent action that tones lax tissue, particularly relevant to boggy, swollen lymphatic tissue. The astringent quality helps to tighten and tone the lymphatic vessels and nodes, reducing excessive fluid accumulation. This complements the alterative and diuretic actions. The astringent taste of cleavers is noted in traditional taste-based assessment systems.
[2, 3]Promotes wound healing
Cleavers has a long traditional history of topical use for wound healing. A 2024 in-vitro study (Beirami et al.) confirmed wound-healing activity of Galium aparine extracts using scratch assay methodology, demonstrating enhanced cell migration and proliferation in wound models. The combination of anti-inflammatory iridoids, antioxidant phenolics, and astringent tannins provides a rational phytochemical basis for the vulnerary action. Traditional application as a poultice for wounds, burns, and skin ulcers is documented across European herbal traditions.
[2, 6, 13]Prevents or slows oxidative damage to cells
Multiple in-vitro studies have demonstrated significant antioxidant activity of Galium aparine extracts, attributed to phenolic acids (chlorogenic acid, gallic acid), flavonoids (luteolin, quercetin, rutin), and iridoid glycosides. Laanet et al. (2023) confirmed antioxidant activity in phytochemical screening of Galium aparine. The antioxidant activity supports tissue protection during inflammatory conditions and contributes to the overall alterative and hepatoprotective actions.
[6, 10]Protects the liver from damage
Sahin et al. (2022) demonstrated that Galium aparine extract (250 and 500 mg/kg) significantly protected against acetaminophen-induced hepatotoxicity in rats, reducing liver enzyme elevation and histopathological damage. This preclinical evidence supports the traditional use of cleavers for hepatic and biliary complaints, including the folk use for jaundice. The mechanism likely involves the antioxidant and anti-inflammatory properties of iridoid glycosides and phenolic acids, particularly chlorogenic acid.
[2, 5]Kills or inhibits the growth of microorganisms
In-vitro studies have demonstrated antimicrobial activity of Galium aparine extracts against several bacterial strains. Sharifi-Rad et al. (2016) showed activity against methicillin-resistant Staphylococcus aureus (MRSA). Beirami et al. (2024) confirmed antimicrobial activity relevant to wound-healing contexts. The antimicrobial action is considered mild and primarily relevant to topical applications and the herb's role in supporting immune and lymphatic function during infection.
[6, 11]Modulates and balances immune function
Ilina et al. (2019, 2020) demonstrated immunomodulatory activity of Galium aparine ethanolic extracts and infusions, showing effects on lymphocyte proliferation and cytokine modulation. This immunomodulating action aligns with the traditional concept of cleavers as a lymphatic system tonic that supports healthy immune surveillance. The lymphatic system is a critical component of immune function, and cleavers' affinity for this system may partially explain its traditional reputation for supporting recovery from infections and chronic immune challenges.
[8, 9]Therapeutic Indications
Lymphatic System
Swollen lymph nodes (lymphadenopathy)
The signature indication for cleavers in Western herbalism. The BHP specifically lists lymphatic swelling as an indication. Cleavers is considered the primary lymphatic herb in the Western materia medica -- no other herb in the tradition has a stronger affinity for promoting healthy lymphatic drainage and reducing lymphatic congestion. Used for reactive lymphadenopathy associated with infection, chronic inflammation, or constitutional lymphatic sluggishness. The fresh juice or fresh plant tincture is considered most effective for this indication.
[1, 2, 3]Lymphatic congestion and sluggish lymphatic drainage
Cleavers is the go-to herb for improving lymphatic flow and reducing tissue congestion. Indicated when there is generalized puffiness, fluid retention, or a sense of tissue heaviness associated with poor lymphatic return. Used in spring cleansing protocols to support lymphatic detoxification pathways. Combined with other lymphatic-supportive herbs (Calendula officinalis, Phytolacca decandra in small doses) in formulas for chronic lymphatic insufficiency.
[2, 3, 13]Tonsillar and adenoid enlargement
Traditional use for chronically enlarged tonsils and adenoids, especially in children. Tonsils and adenoids are lymphoid tissue, and cleavers' lymphatic affinity makes it a specific remedy for chronic tonsillar hypertrophy. Typically used as part of a broader protocol alongside immune-supportive herbs.
[2, 3]Urinary System
Dysuria and urinary tract irritation
BHP-listed indication. Cleavers is used for painful or difficult urination associated with inflammation of the lower urinary tract. The diuretic action increases urine volume, flushing the urinary tract, while the anti-inflammatory and mild antimicrobial properties address underlying irritation. Often combined with other urinary herbs (Arctostaphylos uva-ursi, Equisetum arvense) in formulas for cystitis and urethritis.
[1, 2]Gravel and small urinary calculi
Traditional use for urinary gravel (small stones or crystalline deposits). Gerard and other historical authors recommended cleavers for stone complaints. The diuretic and soothing action is proposed to help flush small calculi and prevent their formation. The alkalinizing effect of citric acid in the fresh juice may also be relevant.
[13, 15]Fluid retention and edema (mild)
The gentle diuretic action of cleavers makes it useful for mild fluid retention and peripheral edema, particularly when associated with lymphatic congestion. It is considered a gentle enough diuretic for long-term use. Not a substitute for pharmaceutical diuretics in cardiac or renal edema but useful as an adjunct in mild, functional fluid retention.
[1, 2]Skin / Integumentary
Chronic skin conditions (eczema, psoriasis, acne)
BHP-listed indication. Cleavers is one of the most important skin herbs in Western herbalism, used for chronic, stubborn skin conditions that reflect underlying lymphatic and eliminatory dysfunction. The rationale is that by improving lymphatic drainage and waste removal, the skin's burden as an eliminatory organ is reduced. Particularly indicated when skin conditions are accompanied by swollen lymph nodes, tissue congestion, or a 'toxic' constitution. Used internally as fresh juice or tincture, and topically as a wash or poultice.
[1, 2, 3]Wounds, burns, and skin ulcers (topical)
Traditional topical use as a poultice for minor wounds, burns, and skin ulcers is supported by Beirami et al. (2024), who demonstrated in-vitro wound-healing activity of Galium aparine extracts with enhanced cell migration and proliferation. The antimicrobial, anti-inflammatory, and antioxidant properties provide a rational basis for the vulnerary action.
[6, 13]Immune System
Recurrent infections with lymphatic involvement
Used traditionally for recurring infections (especially upper respiratory and ear-nose-throat infections) accompanied by swollen lymph glands. The rationale combines lymphatic support (improving the filtering and immune surveillance function of lymph nodes) with mild immunomodulatory activity. Ilina et al. (2019, 2020) demonstrated immunomodulatory effects of Galium aparine extracts in vitro, including modulation of lymphocyte proliferation.
[2, 8, 9]Post-infection recovery and convalescence
Traditional spring tonic use overlaps with convalescent support. Cleavers is used to promote recovery after prolonged illness or infection, particularly when the lymphatic system has been taxed. The alterative action is thought to support efficient clearing of metabolic waste and promote tissue regeneration during recovery.
[2, 3]Hepatobiliary System
Hepatic support and mild liver congestion
Sahin et al. (2022) demonstrated significant hepatoprotective effects of Galium aparine extract against acetaminophen-induced liver damage in rats. Traditional use includes application for jaundice and hepatic complaints. The hepatoprotective mechanism likely involves the antioxidant and anti-inflammatory actions of chlorogenic acid and iridoid glycosides. Supports the role of cleavers as an eliminatory herb that works through multiple detoxification pathways (lymphatic, urinary, and hepatic).
[5, 13]Energetics
Temperature
cool
Moisture
slightly dry
Taste
Tissue States
damp/stagnation, hot/excitation
Cleavers is classified as cool and slightly drying in Western herbal energetics. Its cooling nature makes it appropriate for conditions marked by heat and inflammation -- hot, swollen lymph nodes, inflamed skin conditions, and urinary tract irritation with burning. The slightly drying quality addresses damp, boggy, congested tissue states, particularly lymphatic stagnation with edema and fluid accumulation. The bitter taste stimulates eliminatory functions, the astringent quality tones lax tissue, and the bland quality (insipid, watery taste) reflects its gentle diuretic nature and ability to promote fluid movement through the tissues. Cleavers is specifically indicated for the 'damp/stagnation' tissue state in which lymphatic fluid is sluggish and tissues are puffy, swollen, or congested. The combination of cooling, drying, and moving qualities makes it a quintessential remedy for hot, damp, stagnant conditions in the lymphatic system. CAVEAT: Herbal energetics are interpretive frameworks within Western herbalism, not standardized across all practitioners.
Traditional Uses
British and European herbal medicine (Western herbalism)
- Lymphatic swelling and enlarged glands (the primary historical indication)
- Spring cleansing tonic -- fresh juice taken in spring to 'purify the blood'
- Chronic skin diseases including eczema, psoriasis, and scrofulous conditions
- Urinary complaints including dysuria, gravel, and bladder irritation
- Swollen tonsils and adenoids, especially in children
- As a wash or poultice for wounds, burns, and skin ulcers
- Jaundice and mild liver complaints
- Scorbutic conditions (scurvy prevention -- as a source of vitamin C in spring)
"Nicholas Culpeper (1653) wrote: 'It is a good remedy in the Spring, eaten (being first chopped small, and boiled well) in water-gruel, to cleanse the blood, and strengthen the liver, thereby to keep the body in health, and fitting it for that change of season that is coming.' Gerard (1597) recommended cleavers for 'the bites of venomous serpents and spiders' and as a diuretic for those 'troubled with the dropsie.' Mrs. Grieve (1931) noted: 'Cleavers has a special curative reputation with reference to cancerous growths and allied tumours... A strong decoction of the fresh herb was used as a wash for the face.'"
Eclectic medicine (19th-20th century American)
- Lymphatic enlargement and scrofula
- Chronic skin diseases with lymphatic involvement
- Urinary tract complaints and suppression of urine
- Dropsy (edema) and general tissue congestion
- Psoriasis and obstinate skin eruptions
- As an alterative in 'dyscrasia' (blood disorders) and chronic disease
"The Eclectics valued cleavers primarily as a lymphatic alterative. Felter and Lloyd (1898) in King's American Dispensatory stated that Galium aparine was used 'in urinary diseases, especially suppression of urine, dropsy, and gravel,' and was 'esteemed as an alterative in scrofula, cancerous, and other glandular diseases.' They noted the fresh juice as the preferred preparation."
[16]
European folk medicine
- Fresh herb applied as a poultice for wounds and skin complaints
- Infusion or juice as a spring blood purifier
- Decoction as a diuretic and for kidney stones
- Young shoots eaten as a potherb (boiled as spring greens)
- Seeds roasted as a coffee substitute (the Galium genus is in the same family as coffee, Coffea)
- Hair rinse to promote growth and reduce dandruff
- Remedy for snakebites (poultice, historical)
"Across European folk traditions, cleavers was one of the most commonly used spring herbs. The young shoots were gathered in early spring and cooked as a green vegetable or pressed for juice. The practice of drinking cleavers juice as a spring tonic is documented from medieval times through the modern era across England, Ireland, Scotland, and continental Europe."
South Asian and Himalayan folk medicine
- Treatment of various skin disorders and wounds
- Diuretic for kidney and bladder complaints
- Anti-inflammatory for joint pain and swelling
"Ethnobotanical surveys of Himalayan regions (Amjad et al. 2020) document the use of Galium aparine in traditional medicine for skin disorders, kidney complaints, and as a general anti-inflammatory agent among local communities in Azad Jammu and Kashmir."
[17]
Modern Research
Hepatoprotective activity against acetaminophen-induced liver damage
In-vivo study investigating the hepatoprotective potential of Galium aparine extract (250 and 500 mg/kg b.wt., oral) in a rat model of acetaminophen-induced hepatic encephalopathy. Phytochemical characterization by LC/Q-TOF/MS analysis was performed alongside biological evaluation.
Findings: Galium aparine extract pretreatment significantly protected against acetaminophen-induced hepatotoxicity. Liver enzyme levels (ALT, AST) were significantly reduced in treated groups compared to the hepatotoxicity control. Histopathological examination confirmed reduced liver necrosis and inflammatory infiltration. LC/Q-TOF/MS analysis identified multiple phenolic acids, flavonoids, and iridoid glycosides as constituents. The 500 mg/kg dose showed greater protective effect than 250 mg/kg, suggesting dose-dependent activity.
Limitations: Animal model study; results may not directly translate to clinical outcomes in humans. Single-dose acetaminophen challenge model does not replicate chronic liver disease. Specific active compounds responsible for hepatoprotection were not individually isolated and tested.
[5]
Wound healing, antimicrobial, and antioxidant activity
In-vitro study evaluating antimicrobial, antioxidant, and wound healing properties of Galium aparine extracts. Wound healing was assessed using scratch assay methodology. Antimicrobial activity was tested against a panel of bacterial strains. HPTLC fingerprinting was performed for phytochemical characterization.
Findings: Galium aparine extracts demonstrated significant wound healing activity in the scratch assay, with enhanced cell migration and proliferation compared to controls. Antimicrobial activity was confirmed against multiple bacterial strains. Antioxidant activity was demonstrated through DPPH and ABTS radical scavenging assays. HPTLC analysis confirmed the presence of phenolic compounds, flavonoids, and iridoids consistent with the known phytochemical profile.
Limitations: In-vitro study; cell culture wound models do not fully replicate the complexity of in-vivo wound healing. Clinical translation requires further study. Extract preparation methodology may not reflect traditional therapeutic preparations.
[6]
Anti-proliferative and apoptotic effects on breast cancer cell lines
In-vitro study investigating the anti-proliferative and apoptotic effects of Galium aparine methanol extract on MCF-7 and MDA-MB-231 human breast cancer cells and MCF-10A untransformed breast epithelial cells. Characterization by LC-MS/MS analysis was performed.
Findings: The methanol extract showed dose-dependent anti-proliferative effects on both breast cancer cell lines. Cell cycle arrest and apoptosis induction were demonstrated. Importantly, the extract showed selective toxicity toward cancer cells with relatively lower toxicity to the untransformed MCF-10A cell line. LC-MS/MS analysis identified phenolic acids, flavonoids, and iridoid glycosides as major constituents.
Limitations: In-vitro study using cancer cell lines; findings cannot be extrapolated to clinical anticancer activity. Methanol extract may differ pharmacologically from traditional aqueous or hydroethanolic preparations. No in-vivo or clinical studies have confirmed anticancer activity of cleavers.
[7]
Immunomodulatory activity of ethanolic extracts
In-vitro study evaluating the immunomodulatory effects and phytochemical profiles of ethanolic extracts from Galium aparine aerial parts. Effects on lymphocyte proliferation and cytokine production were assessed.
Findings: Ethanolic extracts of Galium aparine demonstrated immunomodulatory activity, affecting lymphocyte proliferation and cytokine production in vitro. Phytochemical profiling identified iridoids, flavonoids, and phenolic acids as major constituents. The results provide preliminary scientific support for the traditional use of cleavers as an immune and lymphatic system tonic.
Limitations: In-vitro study using isolated immune cells; in-vivo immune modulation involves far more complex systems. Ethanol extract may differ from traditional fresh juice or infusion preparations. Clinical significance of the immunomodulatory effect has not been established.
[8]
Immunomodulatory activity and phytochemical profile of infusions
In-vitro study characterizing the immunomodulatory activity and phytochemical profile of aqueous infusions from Galium aparine aerial parts, a preparation form more closely reflecting traditional use as a tea.
Findings: Aqueous infusions of cleavers demonstrated immunomodulatory effects on human peripheral blood mononuclear cells, supporting the traditional use of the herb as a tea for immune and lymphatic support. Phytochemical analysis of the infusions identified chlorogenic acid, rutin, and other phenolic compounds as major water-soluble constituents. The results confirm that traditional aqueous preparations extract biologically active immunomodulatory compounds.
Limitations: In-vitro study; results may not directly translate to in-vivo immune effects. Single plant material source. No clinical study confirms the immunomodulatory effect of cleavers infusions in human subjects.
[9]
Phytochemical screening and antioxidant activity
Phytochemical screening and antioxidant activity evaluation of Galium aparine alongside other Estonian medicinal plants, using multiple antioxidant assays (DPPH, FRAP, ORAC).
Findings: Galium aparine demonstrated significant antioxidant activity across multiple assay systems. The phenolic acid and flavonoid content correlated with antioxidant capacity. The results support the traditional use of cleavers as a health-promoting herb with tissue-protective properties.
Limitations: Antioxidant activity measured in vitro may not fully reflect in-vivo antioxidant effects. Part of a multi-species screening study with limited depth on G. aparine specifically.
[10]
Anti-MRSA activity of Galium aparine leaf extracts
In-vitro study evaluating the antibacterial activity of Galium aparine and other Rubiaceae species against methicillin-resistant Staphylococcus aureus (MRSA) isolates.
Findings: Methanolic leaf extracts of Galium aparine showed activity against a panel of MRSA clinical isolates. The results suggest potential for further development of cleavers extracts as adjunctive antimicrobial agents, particularly for topical application in skin infections resistant to conventional antibiotics.
Limitations: In-vitro study against isolated bacterial strains. MIC values were modest compared to pharmaceutical antibiotics. Clinical relevance of the anti-MRSA activity has not been established. Methanolic extract may not reflect traditional preparations.
[11]
Preparations & Dosage
Fresh Juice / Expressed Juice
Strength: Fresh-pressed juice of aerial parts (succus)
Gather fresh aerial parts of cleavers in spring (April-June). Wash thoroughly. Run through a juicer or mash vigorously with a mortar and pestle, then strain through cheesecloth or a fine sieve. The resulting bright green juice can be consumed immediately or preserved by adding 20-25% grain alcohol (vodka) to create a preserved succus. Refrigerate the fresh juice if not preserved; use within 24-48 hours.
15-30 mL (1-2 tablespoons) of fresh juice, 2-3 times daily
2-3 times daily, preferably on an empty stomach
Traditionally used as a spring cure for 3-6 weeks. May be used longer under professional guidance.
Children 6-12 years: 5-10 mL fresh juice diluted in water, 1-2 times daily. Not typically used in children under 6.
The fresh juice is the MOST VALUED preparation of cleavers in Western herbalism. Many experienced herbalists consider the fresh juice or fresh plant tincture to be far superior to any dried-herb preparation for lymphatic indications. The Eclectics, Culpeper, and modern authorities (Hoffmann, Priest & Priest) all emphasize the fresh plant. The preserved succus (fresh juice stabilized with 20-25% alcohol) extends shelf life while retaining potency. Spring is the optimal harvest window.
Infusion (Tea)
Strength: Fresh herb: 4-8 g per 250 mL. Dried herb: 2-3 g per 250 mL.
Cold infusion (preferred): Place 2-4 tablespoons (approximately 4-8 g) of fresh chopped herb (or 2-3 g of dried herb) in 250 mL of cold or room-temperature water. Allow to steep overnight (8-12 hours) or for a minimum of 4 hours. Strain and drink. Hot infusion (alternative): Pour 250 mL of boiling water over 2-3 g of dried herb. Cover and steep for 10-15 minutes. Strain.
1 cup (250 mL) of cold or hot infusion, 3 times daily
3 times daily between meals
May be used for 4-8 weeks for spring cleansing protocols. Longer-term use under professional guidance.
Children 4-12 years: 50-100 mL of dilute infusion, 1-2 times daily
The cold infusion is traditionally preferred for cleavers as it is believed to better preserve the delicate iridoid glycosides and produce a more potent lymphatic preparation. The cold water extraction is a distinctive feature of cleavers preparation that sets it apart from most herbal infusions. If using dried herb, the therapeutic effect will be diminished compared to fresh herb preparations. Some herbalists recommend adding a small amount of lemon juice to the cold infusion to enhance extraction.
Tincture
Strength: Fresh plant: 1:2 in 25% ethanol. Dried plant: 1:5 in 25% ethanol.
Fresh plant tincture (preferred): Chop fresh aerial parts finely and macerate in 25% ethanol at a ratio of 1:2 (fresh weight to menstruum) for 2-4 weeks with daily agitation. Press, strain, and filter. Dried plant tincture (alternative): Macerate dried aerial parts in 25% ethanol at a ratio of 1:5 for 2-4 weeks. Press, strain, and filter.
Fresh plant tincture (1:2, 25%): 2-4 mL, 3 times daily. Dried plant tincture (1:5, 25%): 3-5 mL, 3 times daily.
3 times daily
May be used for extended periods. Spring cleansing protocols typically run 4-8 weeks.
Children 4-12 years: 0.5-1 mL diluted in water, 2-3 times daily (consult practitioner)
The fresh plant tincture is strongly preferred over the dried plant tincture and is the standard preparation form in professional Western herbal practice. The lower alcohol percentage (25%) reflects the water-soluble nature of many of cleavers' active constituents (iridoids, phenolic acids). Higher alcohol percentages are not necessary and may actually extract less of the hydrophilic compounds. The BHP lists the tincture dosage as 2-4 mL of a 1:5 dried herb tincture in 25% ethanol, three times daily.
Glycerite
Strength: 1:3, 60% glycerin / 40% water (from fresh herb)
Chop fresh aerial parts and macerate in a mixture of 60% vegetable glycerin and 40% water at a ratio of 1:3 for 4-6 weeks with daily agitation. Press, strain, and filter.
3-5 mL, 3 times daily
3 times daily
May be used for extended periods
Children 2-6 years: 1-2 mL, 1-2 times daily. Children 6-12 years: 2-3 mL, 2-3 times daily.
Alcohol-free preparation suitable for children, those avoiding alcohol, and as an alternative when fresh juice is not available. The glycerite is a reasonable alternative when the fresh plant is out of season. Glycerin extracts hydrophilic compounds (iridoids, phenolic acids) reasonably well, though the fresh juice and fresh plant tincture are generally preferred.
[2]
Poultice
Strength: Fresh bruised herb, applied directly
Gather fresh cleavers aerial parts and bruise or crush them thoroughly. Apply the bruised fresh herb directly to the affected skin area. Cover with a clean cloth or gauze bandage. Replace every 2-4 hours with fresh plant material.
Apply to affected area, replace every 2-4 hours as needed
2-3 applications daily
Continue until wound or skin condition improves. Seek medical attention if condition worsens.
Suitable for children; apply under adult supervision
The fresh poultice is one of the oldest and most traditional preparations of cleavers, documented since at least Gerard (1597) for wounds, burns, and skin ulcers. The hooked trichomes of the fresh plant cause it to naturally 'cleave' to the skin, aiding adherence. The direct application delivers iridoid glycosides, phenolic acids, and tannins to the wound site. Beirami et al. (2024) provided in-vitro support for the wound-healing application.
Capsule / Powder
Strength: Dried powdered aerial parts, typically 500 mg per capsule
Dried aerial parts are finely powdered and encapsulated. Due to the general preference for fresh plant preparations, capsules are a less favored form but available commercially.
500-1500 mg dried herb powder, 2-3 times daily
2-3 times daily with water
4-8 weeks typical course
Not recommended for children in capsule form; use glycerite or dilute infusion instead
Capsules of dried cleavers are the least preferred preparation form among Western herbalists due to the significant loss of potency associated with drying this herb. Available commercially for those who find the taste of the juice or infusion unpalatable. If using capsules, higher doses may be needed to approximate the therapeutic effect of fresh plant preparations.
[2]
Safety & Interactions
Class 1
Can be safely consumed when used appropriately (AHPA Botanical Safety Handbook)
Contraindications
Although allergic reactions to cleavers are very rarely reported, individuals with known sensitivity to members of the Rubiaceae (madder) family should avoid use. Contact dermatitis from handling the fresh plant has been occasionally reported, likely due to mechanical irritation from the hooked trichomes rather than a true allergic response.
Drug Interactions
| Drug / Class | Severity | Mechanism |
|---|---|---|
| Diuretic medications (thiazides, loop diuretics, potassium-sparing diuretics) (Diuretics) | moderate | Additive diuretic effect. Cleavers has a well-established diuretic action that may enhance the effects of pharmaceutical diuretics, potentially leading to excessive fluid loss, electrolyte imbalances, or hypotension. |
| Lithium (Mood stabilizers) | theoretical | Diuretic herbs may alter renal lithium clearance. Increased urine output from cleavers could theoretically reduce lithium reabsorption in the proximal tubule (similar to the mechanism by which thiazide diuretics affect lithium levels), although the opposite effect (increased lithium concentration due to sodium/volume depletion) is also theoretically possible depending on the specific renal mechanisms involved. |
| Antidiabetic medications (Hypoglycemic agents) | theoretical | Some Galium species have shown preliminary hypoglycemic activity in preclinical research. Additive blood glucose lowering is theoretically possible when combined with insulin or oral hypoglycemic agents. |
Pregnancy & Lactation
Pregnancy
insufficient data
Lactation
insufficient data
No specific safety studies of Galium aparine in pregnancy or lactation have been conducted. The AHPA Botanical Safety Handbook (Class 1) does not list specific pregnancy or lactation restrictions. However, given the diuretic action and the general principle of caution regarding herbal medicines during pregnancy, therapeutic doses of cleavers are not recommended during pregnancy without professional guidance. Small amounts consumed as a food (young shoots as spring greens) are unlikely to be problematic based on centuries of use without reported adverse effects. During lactation, the limited data makes it prudent to consult a qualified practitioner before use.
Adverse Effects
References
Monograph Sources
- [1] British Herbal Medicine Association Scientific Committee. British Herbal Pharmacopoeia: Galium aparine (Cleavers). British Herbal Medicine Association, Bournemouth (1983) : 103-104
- [2] Hoffmann D. Medical Herbalism: The Science and Practice of Herbal Medicine. Healing Arts Press, Rochester, VT (2003) . ISBN: 978-0892817498
- [3] Priest AW, Priest LR. Herbal Medication: A Clinical and Dispensary Handbook. L.N. Fowler & Co., London (1982) . ISBN: 978-0852431610
- [4] McGuffin M, Hobbs C, Upton R, Goldberg A (eds). American Herbal Products Association's Botanical Safety Handbook. CRC Press, Boca Raton, FL (1997) . ISBN: 978-0849316753
Clinical Studies
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Traditional Texts
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Pharmacopeias & Reviews
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Last updated: 2026-03-01 | Status: published
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