Common Names
- Lappa
- Wild gobo
- Happy major
- Niubang
For Patients & Caregivers
There is no evidence to support use of burdock to treat cancer, infections, diabetes, or other medical conditions.
Certain components of burdock were shown to stop the growth of bacteria and fungi in lab studies. In animal experiments, the root extract lowered blood sugar, stimulated uterine contractions, induced an immune response, and protected against DNA mutations. A clinical study found that application of a cream containing burdock extract improved the appearance of wrinkled skin.
-
To treat cancer
There is no scientific evidence to support this use. -
To lower blood sugar in diabetes
One small study found that burdock reduced proteinuria and improved post-meal blood glucose levels and lipid metabolism in patients with diabetic nephropathy. -
To treat eczema and psoriasis
No scientific evidence supports this use. -
To treat HIV and AIDS
This claim is not backed by scientific data. -
To treat microbial infections
Although certain compounds in burdock can stop the growth of bacteria and fungi in lab studies, human data are lacking. -
To promote urination
No scientific evidence supports this use. -
To reduce wrinkles
One clinical study found that application of a cream containing burdock extract improved the appearance of wrinkled skin. However, more studies are needed to confirm this effect.
Burdock is one of the ingredients in the herbal tea Essiac.
For Healthcare Professionals
Burdock, a perennial plant native to Europe and Northern Asia, is now found worldwide. The root has been consumed as food in Asia for many centuries. The fruit is valued in traditional Chinese medicine as a blood purifier, a cure for sore throat and colds, and as a topical remedy for skin disorders including acne, eczema and psoriasis. It is also used to treat anorexia, gout, cancer and HIV, although no published clinical studies have evaluated these claims.
Preclinical data indicate that burdock has anti-inflammatory (1), antibacterial (11), antiulcerogenic (12), hepatoprotective (6), antidiabetic (13) and anticancer (14) effects. A clinical study found that topical application of a formulation containing burdock extract significantly improved dermal extracellular matrix metabolism and visibly reduced wrinkles (4). A mixture of burdock fruit and astragalus root reduced urinary protein and albumin, and improved lipid metabolism and post-prandial blood glucose in patients with diabetic nephropathy (5).
A preparation of burdock tea was found contaminated with atropine, an alkaloid (7). Patients should be aware that poor quality control is a major concern with commercial herbal products.
Arctiin and arctigenin, the lignans present in burdock, exert anti-inflammatory effects by inhibit the pro-inflammatory factors, nitric oxide (NO), tumor necrosis factor-alpha (TNF-a), and interleukin-6 (IL-6) (3) (4). The polyacetylenes and chlorogenic acid have antibacterial properties and are thought responsible for burdock’s beneficial effects against infections and skin disorders (11).
Arctigenin and arctiin, along with lignans matairesinol, (iso)lappaol A, lappaol C, and lappaol F were shown to up-regulate the expression of Jun-N-terminal kinase-1 (jnk-1), and promote longetivty and stress resistance in the round worm Caenorhabditis elegans via the JNK-1-DAF-16 cascade (15).
Animal studies indicate that burdock extract induces hypoglycemia and increases carbohydrate tolerance, stimulates uterine smooth muscle, and has antimutagenic activity. The tannin extract induces macrophage response (8). Burdock also exhibits hepatoprotective effects in rats due to its antioxidative activity (6).
Further, Lappaol F was shown to induce G(1) and G(2) cell-cycle arrest, induce cell death in several cancer cell lines, and to activate caspases (16). In other studies, arctigenin inhibited the proliferation, and induced caspase-3-dependent apoptosis of ovarian cancer cells via suppression of inducible nitric oxide synthase (iNOS)/nitric oxide (NO)/signal transducer and activator of transcription-3 (STAT3)/survivin signalling pathway (17).