The Herb Cabinet 本草

牛蒡子 niú bàng zǐ

Arctium lappa · burdock fruit

Cold Pungent · Bitter LungStomach

“The burr that sticks to your socks holds seeds the tradition trusts with hot, swollen throats. Nature's velcro, repurposed as medicine.” — Lao Xinglin

What the tradition says

The same burdock whose burrs inspired velcro gives the pharmacy its seeds: cold, pungent-bitter dispersers for wind-heat with a sore throat — their signature indication and their ticket into Yin Qiao San^[1]. The tradition also uses them to vent incompletely erupted rashes, moisten the intestines as seeds tend to, and clear fire toxin from swellings like mumps and boils^[1].

What the research says

Arctiin and arctigenin, the seeds' lignans, carry an active laboratory literature — anti-inflammatory and antiviral signals in cells and animals — without independent clinical trials. The root, meanwhile, is simply dinner (gobo in Japan), lending the plant a long food-safety record that the seed shares at formula doses.

Where to be careful

Cold and slippery: the tradition withholds the seeds where diarrhea is already loose or the pattern runs cold^[1]. Asteraceae-allergic readers (ragweed family) should be aware of the relation.

In the pharmacy

Small, grey-brown, slightly curved seeds, usually dry-fried to soften their coldness and crack their coats before decocting^[1].

Reviewed 2026-08-26