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Burdock (Arctium lappa L.) — Greater Burdock, Great Burdock, Gobo, Beggar's Buttons, Clotbur.
Materia Medica
Family: Asteraceae
Common names: Burdock, Greater Burdock, Great Burdock, Gobo, Clotbur, Beggar's Buttons
Botanical name: Arctium lappa L. (synonym Arctium majus)
Parts used: first-year root; separately, young leaf stalks and leaves as food, and mature fruit/seed (Arctii fructus / Niu Bang Zi) in East Asian herbalism
Growth habit: large biennial with a basal rosette in the first year and a tall flowering stem in the second
Traditional systems: European herbalism, Japanese and Korean foodways, traditional Chinese herbalism.
Actions & Energetics
European traditional categories: mild diuretic, bitter digestive herb, skin-focused alterative and nutritive root. The European Medicines Agency records burdock root for traditional use in minor urinary complaints, temporary appetite loss, and seborrhoeic skin conditions; those indications are based on long use, not demonstrated clinical efficacy.
Traditional energetics: root is generally described in Western herbalism as cooling, moistening/nourishing and mildly bitter. Chinese tradition distinguishes the fruit from the root: Niu Bang Zi (burdock fruit) has classically been described as acrid, bitter and cold and is used in formulas for externally contracted wind-heat, throat and eruptive illnesses. Do not apply its classical doses or indications to the European root.
Botanical Description
In its first year, Arctium lappa forms a conspicuous ground-level rosette of very large broadly heart-shaped, rough green leaves on long stalks. Leaf undersides are pale and densely woolly. Its long fleshy taproot may become thick, tapering and deeply anchored. In the second year, a sturdy branched stalk carries clusters of purple tubular florets surrounded by rounded heads of hooked involucral bracts. The burrs catch on cloth and animal fur, dispersing the mature fruit. Greater burdock commonly stands taller and bears larger round flower heads than lesser burdock.
Name Confusion & Look-Alikes
Greater versus lesser burdock: A. lappa, A. minus and A. tomentosum are related but distinct species. Some European pharmacy monographs permit material from several named species under the umbrella dried-root preparation; this page is specifically about Arctium lappa. The common word 'burdock' alone is not sufficient for accurate species identification.
Large juvenile leaves can be confused with dock (Rumex), rhubarb or other rosette-forming plants; mistaken roots can be especially difficult to verify after cleaning. Confirm the complete plant, habit, pale leaf underside and later hooked burrs before collecting. Root, flowering heads and medicinal fruit/seed are different materials.
Traditional Indications
European root tradition: herbal infusions, powders and extracts for minor urinary tract complaints where increased urination was desired, temporary poor appetite, and seborrhoeic skin complaints. Older household herbalism also employed burdock root in spring bitters and skin-focused mixtures.
Asian food history: cultivated first-year roots, known as gobo, are cooked as a vegetable in Japan and Korea. Chinese medicine: the separately harvested burdock fruit, Niu Bang Zi, is found in formulas for throat discomfort, wind-heat patterns and impaired expression of some rashes. Historic formula descriptions and food practices are not interchangeable with the European root monograph.
Preparations & Dosage
Plant-part and evidence distinction: all quantities in the root sections refer to Arctium lappa dried root unless a recipe says otherwise. European herbal monograph amounts are recorded for adults and older people; these ranges do not apply automatically to children, to seed/fruit, or to unstandardized concentrated products.
Traditional Root Infusion — European Monograph
Documented single amount: 2–6 g dried comminuted root; European monograph frequency: three times daily.
Household method: place the measured cut root in a covered vessel, add approximately 150–250 mL freshly boiled water, cover and steep for 15 minutes, then strain. The herb and dose follow the traditional root infusion range; the water volume and steep time describe a practical household extraction procedure, not a single mandatory pharmacopeial formula.
Burdock Root Decoction — Culinary/Herbal Preparation
Ingredients: 5 g dried, cut first-year root and 300 mL water.
Method: combine in a small pot, bring to a gentle simmer, cover loosely and simmer 15–20 minutes. Strain; use as a preparation example rather than converting its volume into a standardized extract dose. Young clean food roots may also be simmered in soups and broths.
Dried Root Powder
European monograph adult amount: 350 mg powdered root per dose, three to five times daily. This is the recorded dried-root preparation, not a universal amount for fruit, seed, or commercial extract.
Method: mill fully dried identified first-year root until fine; accurately weigh a measured portion before blending with food or a suitable liquid. Keep the powder dry and labeled with the botanical name and harvested plant part.
Root Tincture — 1:5
Ratio: 1 part dried root by weight to 5 parts finished tincture by volume. The EMA describes a 1:5 tincture using 25% ethanol. Documented adult amount: 8–12 mL of this 25% tincture, three times daily.
Method: for a small batch, begin with 100 g dried, chopped root and sufficient 25% ethanol-water menstruum to yield approximately 500 mL pressed and filtered tincture. Cover, macerate for approximately 2–4 weeks, agitating periodically; press and filter, then record the final finished volume. Avoid assigning the finished 1:5 ratio solely on the amount of menstruum poured onto an absorbent herb.
Root Tincture — 1:10
Ratio: 1:10 using 45% ethanol-water; the EMA also documents 8–12 mL three times daily for this specified preparation. A 100 g dried-root batch corresponds to approximately 1,000 mL finished tincture. Macerate in sufficient menstruum, press, filter and measure the finished yield. This is a different concentration and alcohol strength from the 1:5 tincture.
Root Liquid Extract — 1:1
European monograph: 1:1 dry-root-equivalent liquid extract made with 25% ethanol; documented adult range 2–8 mL three times daily. Professional maceration or percolation and accurate finished-volume adjustment are needed to establish the extraction ratio; do not substitute a household tea for this extract.
Root-Infused Oil — External Household Preparation
Ratio: 1 part completely dried chopped root to about 5 parts carrier oil by weight (for example, 20 g dried root with 100 g olive or sunflower oil).
Method: place dried root in a clean dry jar, cover completely with the oil and steep in a dark cool place for about 3–4 weeks, checking that the herb stays submerged. Strain thoroughly through clean cloth and filter, then label and store away from heat and light. This is a practical external herbal infusion, not an official standardized medicinal oil or a preparation for deep wounds.
Simple Gobo Root Stir-Fry — Food Recipe
Ingredients: about 200 g freshly harvested or purchased first-year burdock root, 1 tablespoon cooking oil, 1 tablespoon soy sauce, 1 teaspoon sugar or honey, 2 tablespoons water, optional sesame seeds.
Method: scrub the roots well, peel only if desired, cut into thin matchsticks, and soak briefly in cool water. Drain. Heat the oil; add the root and stir-fry 5–7 minutes. Add water, soy sauce and sweetener; simmer until tender and the glaze reduces. Sprinkle with sesame. This is a vegetable dish, not a medicinal tincture dose.
Children & Adolescents — Evidence Limit
The EMA traditional root monograph does not recommend medicinal use in people younger than 18 years because adequate data were not established. No universal pediatric dose can responsibly be inferred from adult root doses. Food preparation is a separate context.
Classical Formulations
European root: Burdock root appeared in numerous historical compound bitter and alterative herbal preparations, but the evidence reviewed does not support assigning one universal named classical formula to all European burdock-root use.
East Asian fruit: Niu Bang Zi, the fruit of burdock, appears in classical formulas such as Yin Qiao San. This illustrates the distinct Chinese fruit tradition; it is not a formula for substituting dried burdock root or seed doses indiscriminately.
Constituents
Root: inulin-type fructans, polysaccharides, phenolic acids including chlorogenic/caffeoylquinic acids, polyacetylenes and other secondary metabolites. Fruit/seed: lignans including arctiin and arctigenin, plus other lignan derivatives and phenolics. Chemical amounts depend on the species, cultivated conditions, part harvested, maturity and extraction process. Seed lignan research is not evidence that a household root infusion delivers an equivalent amount.
Modern Research
Laboratory and animal studies have explored antioxidant, anti-inflammatory, antimicrobial and metabolic activities in isolated compounds and extracts of burdock. Human evidence is substantially smaller. Small clinical studies have evaluated burdock tea in people with knee osteoarthritis, compound preparations for diabetic nephropathy, and a topical product containing burdock fruit extract for skin aging; they do not demonstrate equivalent benefits from every home root preparation. Human research has not established burdock as a cure for infection, cancer or diabetes.
Adverse Effects
Documented adverse reactions include allergic contact dermatitis and rare severe allergic reactions, including anaphylaxis after boiled burdock; frequency is uncertain. A case of liver injury involved a multi-herb liver preparation containing burdock and cannot automatically be attributed to Arctium lappa alone. Commercial burdock root products have previously been implicated in poisoning from contamination with atropine-containing plants. Correct plant identity and clean sourcing are essential.
Interactions & Contraindications
The 2010 European root monograph reports no established drug interactions but advises against combining its traditional urinary-flushing regimen with synthetic diuretics. Hypersensitivity to burdock or Asteraceae plants is a contraindication. Blood-glucose and uterine effects are discussed in preclinical research and should not be portrayed as proven human pharmacokinetic interactions. Do not use the plant to self-treat severe urinary symptoms.
Pregnancy & Breastfeeding
The European root monograph does not recommend medicinal burdock root in pregnancy or breastfeeding because adequate safety data are lacking. Animal work has reported uterine stimulation; this is a preclinical signal, not evidence of safety in people. Culinary food amounts and concentrated medicinal preparations are distinct forms of use.
Habitat & Cultivation
Native range: Europe and temperate Asia; naturalized in much of North America. Habitat: disturbed soils, woodland edges, field boundaries and rough ground. Soil: deep, loose, well-drained loam best for unbroken roots. Light: full sun to partial shade. Climate: hardy in many temperate areas, roughly USDA Zones 3–9, but local adaptation and seed source matter. Life cycle: biennial, normally growing a root and leaf rosette in year one and flowering in year two. Its burrs can spread readily and become troublesome around livestock and clothing.
Propagation
Propagate from seed, preferably directly into deeply prepared soil because a long taproot makes transplanting difficult. Sow shallowly, keep evenly moist to establish, then thin so the first-year roots have room to develop. Remove or bag second-year burrs before they disperse if volunteer seedlings are unwanted.
Harvesting & Drying
Harvest first-year roots in autumn or early in the second spring, before the flowering stalk expends the root reserves. Dig deeply to retrieve the full taproot; wash and slice while fresh. To dry, cut into uniformly small pieces and dehydrate with good airflow at low heat until fully dry and hard, then store airtight, cool and dark. Pick fruit/seed only with correct botanical identification, and keep its medicinal material separate from root. Avoid roadside verges, herbicide-treated ground, industrial sites and agricultural drainage because the roots are in contact with soil contaminants.
Food Use
Young greater-burdock roots are a familiar root vegetable in Japanese food under the name gobo, typically sliced into stir-fries, soups and braises. Peeled young stalks have also been cooked regionally. Burdock root food use is a long-standing tradition independent of claims for medicinal root extracts; coarse mature leaves and burrs are not prepared in the same way as edible young roots.
History, Folklore & Spiritual Use
Beggar's buttons and clingers: burdock's stubborn hooks furnished many local English-language names, including beggar's buttons, bardog, sticky buds and clingers. In a British folk account, children tossed burdock burs onto a friend's back: whether the burs stuck was interpreted as a playful sign of a sweetheart's affection.
Pixies in Cornwall: recorded Cornish lore describes pixies tangling horses' manes with burdock burs while riding them at night. This is a reported legend, not a literal botanical claim. In Scottish tradition, the Burry Man of South Queensferry wears a costume covered in many burdock burs during an August community procession.
Hook-and-loop fasteners: the hooked burr inspired Swiss inventor George de Mestral's development of Velcro after observing burrs clinging to clothing and his dog. The invention is a documented example of technology borrowed from the plant's seed-dispersal structure.
Household symbolism: burdock's deep root and tenacious burr have contributed to associations with tenacity, protection and holding fast in modern folk magic. Those associations are symbolic traditions; where a specific old practice has not been documented it should not be represented as ancient folklore. No invented fixed zodiac or tarot correspondence is added.
Materia Medica Summary
Burdock (Arctium lappa) is a biennial European and Asian plant valued for its first-year root as food and in European traditional herbalism, while the separately harvested fruit has its own East Asian medicinal tradition. Dried root has been prepared as infusion, powder, tinctures at 1:5 and 1:10, liquid extract, decoction and food. Root chemical constituents and clinical evidence must not be confused with the fruit's lignan research. Its rich history includes gobo cooking, regional plant names, British and Scottish burdock-burr folklore, and the invention of hook-and-loop fasteners.