Research review
burdock root benefits: what the research does and doesn't show
The human evidence for burdock root itself is two small trials, in women with polycystic ovary syndrome and adults with knee osteoarthritis, that measured blood markers, plus a few studies of tea, extract or blends. Most other research is in cells and animals.
The research doesn't support burdock root as a treatment for any condition. Only two small trials gave people burdock root itself, one in women with polycystic ovary syndrome and one in adults with knee osteoarthritis, and both measured blood markers rather than how people felt. A few more tested burdock tea, extract or a blend, all in people with a condition. Everything else comes mostly from cell and animal studies, which can't tell you what it does in a person.
What the evidence doesn't support
It doesn't support burdock root for the liver, kidneys, skin, blood pressure or blood sugar, and it doesn't support the traditional idea that burdock "cleanses" or "detoxifies" the blood. A 2011 review of burdock's pharmacology describes that as a traditional-Chinese-medicine concept, not a measured effect. No randomised trial of burdock root in people with liver or kidney conditions turned up in a PubMed search on 2 October 2026, and the only liver report found was a case of liver injury after a six-herb tea (below). None of what follows should be read as burdock treating, preventing or curing anything.
What the trials found
Women with polycystic ovary syndrome, root powder. A randomised, double-blind, placebo-controlled trial at one centre in Iran (2023 to 2024) gave 60 women with polycystic ovary syndrome either 460 mg a day of burdock root powder or placebo for 12 weeks (30 per group). Compared with placebo, superoxide dismutase and catalase rose, malondialdehyde and C-reactive protein fell, and the volume of both ovaries fell. Hirsutism score and menstrual frequency were also measured; the abstract reports no result for them. These are lab markers and imaging in women with a diagnosed condition, in a single trial, not replicated. They don't tell you what root powder would do for someone without that condition, or how anyone felt.
Knee osteoarthritis, tea. In a 42-day randomised trial of 36 patients aged 50 to 70, everyone took acetaminophen and glucosamine; half also drank three cups a day of burdock root tea (2 g of root per 150 mL cup, so about 6 g of root a day) and half drank plain boiled water. The tea group had lower serum IL-6, hs-CRP and malondialdehyde. It measured blood markers, not pain or function, in a small group already on standard medication, with a tea rather than a capsule.
Diverticular disease, tea. In an open-label randomized trial of 161 patients newly diagnosed with diverticular bleeding or acute diverticulitis, 1.5 g of burdock tea three times a day, against no treatment, was followed by fewer repeat diverticulitis episodes (5 of 47 versus 14 of 44) and no difference for bleeding (PMID 31043657). There was no placebo, the abstract does not say which plant part the tea used, and it was in people with a diagnosed condition, so it does not show what burdock does for anyone else.
Older women with metabolic syndrome, extract plus exercise. A second trial of aqua exercise and burdock root extract in elderly women with metabolic syndrome found higher sex-hormone-binding globulin and estradiol with both exercise and the extract, DHEA-S higher only with the extract, and no combined benefit; the abstract gives no dose (PMID 33664334). It is a small trial of an extract, not the root.
Older women with metabolic syndrome, extract. A 16-week randomised trial of 42 older women with metabolic syndrome tested aqua exercise, burdock extract, or both. Exercise improved insulin resistance; the combination of burdock extract and exercise showed an additional improvement in arterial-stiffness measures. The abstract gives no burdock dose, and it was an extract combined with exercise, so it can't be read as an effect of burdock root alone.
A four-ingredient blend. In 36 adults with H. pylori infection, 8 weeks of a complex of burdock, angelica, gromwell and sesame oil, against placebo, was followed by differences in a breath-test value and in blood markers versus placebo (PMID 29520881). Because it had four ingredients, none of this can be credited to burdock alone.
Blood sugar. A 2026 review found that burdock's glucose-related effects were shown in animal and cell models; the limited clinical data in non-diabetic groups focused on systemic inflammation, and the authors identified a significant gap in randomised trials of glucose outcomes in people with diabetes.
Skin. A 2025 critical review of burdock in immune-mediated skin conditions found most data came from cell and mouse models using varied preparations, with limited clinical validation and no robust randomised trials. The one clinical study found, a small uncontrolled observational study of 34 people with acne, used a homeopathic preparation (Lappa, 6c to 1M potencies) over six months, not burdock root powder or tea, and called for controlled trials.
Questions people ask
What is burdock root good for, and why is it good for you?
No health benefit has been established. As food, it is a fibre-containing root vegetable (see what is burdock root). Its traditional uses are not research results.
What does burdock root do to the body?
In the two trials, blood markers of oxidative stress and inflammation differed from comparison groups, in people with specific conditions. Those results don't tell you what it does in a healthy person.
Is burdock root tea good for you, and what are the benefits for women?
The tea trial was in adults with knee osteoarthritis who were also on standard medication. The only trial in women, using capsule-sized root powder, was in women with polycystic ovary syndrome. Neither supports a general benefit.
Is burdock root good for kidneys or the liver?
We found no human trial for either. A review of plants used as diuretics in Brazil lists burdock among those used popularly that still lack scientific studies. A 2022 case report describes acute liver injury after a herbal liver "detox" tea that contained burdock root, nettle, cleavers, dandelion root and lemon peel and leaf; six ingredients were present, so the cause can't be pinned on burdock, but it is a reason not to assume herbal products are harmless.
Is burdock root good for diabetics or high blood pressure?
No trial shows it. For blood sugar, see the review above; for blood pressure, the only trial found measured it alongside arterial stiffness in older women with metabolic syndrome using burdock extract with exercise, and reports no blood-pressure effect for burdock in its abstract. If you take medication for either, talk to your pharmacist; see burdock root and medications: what to check.
Is burdock root good for skin or hair?
No randomised trial of burdock root for skin or hair turned up. The skin evidence is the review and homeopathic study described above.
When to talk to a doctor
Burdock root is not a treatment for polycystic ovary syndrome, osteoarthritis, diabetes, or any other condition. If you have one of them, talk to your doctor before adding it, particularly if you take medication. Stop and get advice if you develop a rash, itching or swelling, which can be an allergic reaction in people sensitive to plants in the daisy family; see who should not take burdock root.
Sources
- Effects of Arctium lappa L. Root Powder on Some Markers of Oxidative Stress and Inflammation in Women with Polycystic Ovary Syndrome: A Randomized, Double-Blind Controlled Clinical Trial Study In 60 women with PCOS, 460 mg a day of burdock root powder for 12 weeks shifted oxidative-stress and inflammation markers versus placebo.
- Effects of Arctium lappa L. (Burdock) root tea on inflammatory status and oxidative stress in patients with knee osteoarthritis In 36 adults with knee osteoarthritis, 6 g a day of burdock root as tea for 6 weeks shifted blood inflammation and oxidative-stress markers.
- The Combined Intervention of Aqua Exercise and Burdock Extract Synergistically Improved Arterial Stiffness: A Randomized, Double-Blind, Controlled Trial In 42 older women with metabolic syndrome, burdock extract combined with aqua exercise improved arterial-stiffness measures beyond exercise alone over 16 weeks.
- Unveiling the Antihyperglycemic Potential of Arctium lappa L. (Asteraceae): Traditional Application, Phytochemistry, and Molecular Insights A 2026 review found burdock's blood-sugar effects come mainly from cell and animal studies and called for randomised trials in people.
- Immunopharmacological potential of Arctium lappa L. in immune-mediated skin diseases: A critical review of experimental and clinical evidence A 2025 review found burdock's effects on skin-related immune pathways rest mostly on cell and mouse studies, with no robust randomised trials in people.
- Observational study of Arctium lappa in the treatment of acne vulgaris A small uncontrolled study of homeopathic burdock (6c to 1M potencies, not root) in 34 people with acne reported improvement; the authors say controlled trials are needed.
- A review of the pharmacological effects of Arctium lappa (burdock) A 2011 review of burdock notes its traditional uses and warns that it can cause contact dermatitis and other allergic or inflammatory reactions.
- Drug-Induced Liver Injury from Herbal Liver Detoxification Tea One woman had liver injury after a six-herb tea that included burdock root; which ingredient was responsible is not known.
- Exotic Medicinal Plants Used in Brazil with Diuretic Properties: A Review A review of plants used as diuretics in Brazil lists burdock among those used popularly but still lacking scientific studies.
- Effects of Burdock tea on recurrence of colonic diverticulitis and diverticular bleeding: An open-labelled randomized clinical trial In an open-label trial with no placebo, 1.5 g of burdock tea three times a day was followed by fewer repeat diverticulitis episodes but no difference in diverticular bleeding.
- Exercise training and burdock root (Arctium lappa L.) extract independently improve abdominal obesity and sex hormones in elderly women with metabolic syndrome In older women with metabolic syndrome, burdock root extract was followed by higher SHBG, estradiol and DHEA-S levels; the abstract gives no dose.
- Beneficial effect of Burdock complex on asymptomatic Helicobacter pylori-infected subjects: A randomized, double-blind placebo-controlled clinical trial In 36 adults with H. pylori, a four-ingredient burdock complex for 8 weeks was followed by lower breath-test values than placebo; burdock cannot be separated out.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.