No specific dose of burdock has been proven effective or safe, although a range of doses and types of preparations have been used. Dosing regimens are based on traditional health practice patterns, expert opinion, and anecdote. Reliable human trials demonstrating safety or efficacy from a particular dose are lacking.
Burdock as a cracker or dried root has been taken by mouth. Two 425-475 milligram burdock capsules have been taken by mouth three times daily. A decoction of 2-6 grams of dried burdock root or 500 milliliters of a decoction (1:20) has been taken by mouth daily. As an alcohol extract, 1-12 milliliters (1:5 or 1:10 in 25% or 45% alcohol) has been taken by mouth up to three times daily. As a fluid extract, 2-8 milliliters (1:1 in 25% alcohol) has been taken by mouth three times daily. As a root tea, one teaspoon or 2-6 grams of dried burdock root has been boiled in water up to three times daily.
Burdock has been used as a diuretic (to increase urine flow), with preparations from powdered burdock seeds made into a yellow product called oil of lappa.
Burdock has been used on the skin as a compress or plaster for inflammatory skin conditions (eczema, psoriasis), baldness, and warts.
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