Cut burdock and it browns quickly — a sign of how many polyphenols it holds. But the more interesting compound is inulin.
Inulin is a polysaccharide of linked fructose units that human digestive enzymes cannot break down. It travels intact to the colon, where bifidobacteria and other beneficial species consume it. It is the textbook prebiotic.
Key benefits
Inulin increases beneficial bacteria
Inulin is the classic prebiotic, and studies repeatedly find an increased proportion of bifidobacteria after intake. Fermentation produces short-chain fatty acids such as butyrate, which fuel the cells lining the colon.
Fibre supports bowel movement and fullness
3.3 g per 100 g is high for a vegetable, and its firm texture means real chewing. At 72 kcal it is undemanding for a root vegetable.
Polyphenols contribute antioxidant activity
It is rich in chlorogenic acid and related polyphenols — the same compounds responsible for the browning. They concentrate near the skin, so peeling thoroughly costs you.
Potassium helps excrete sodium
308 mg per 100 g. Soy-braised burdock pushes sodium up, so to keep the potassium advantage, season it lightly.
How to eat it well
- Scrape the skin with the back of a knife rather than peeling. Polyphenols concentrate there.
- Soaking in vinegar water reduces browning but leaches polyphenols too. Browning is not a quality problem, so keep the soak brief.
- Drinking it as tea delivers only what dissolves in the water; if you want the fibre, eat the root.
- Stir-frying or frying beats braising where sodium is concerned.
- If it is new to you, start small. Inulin produces a lot of gas in some people.
What to watch out for
- Inulin is high in FODMAPs. With irritable bowel syndrome, expect significant bloating and gas.
- With Asteraceae allergy (ragweed, mugwort), you may react to burdock too.
- If you restrict potassium for kidney disease, check your intake.
- Foraging wild burdock root is not advised; it can be confused with toxic plants.
- Some commercial burdock teas are roasted to the point of scorching — avoid the very dark ones.
Nutrition
Approximate values per 100 g edible portion.
- Calories
- 72 kcal
- Carbohydrates
- 17.3 g
- Fiber
- 3.3 g
- Protein
- 1.5 g
- Potassium
- 308 mg
- Magnesium
- 38 mg
- Folate
- 23 µg
- Calcium
- 41 mg
Key nutrients
- Fiber
- Potassium
- Magnesium
- Folate
- Quercetin