Polygonum multiflorum, for Polygonaceae perennial twining vine. Roots slender, terminal into a hypertrophic tuberous root, appearance reddish brown to dark brown. The gas is slight, the taste is slightly bitter and sweet.
tonifying essence and blood, black hair, strengthening bones and muscles, tonifying liver and kidney.
The root contains anthraquinone compounds, mainly emodin (emodin), chrysophanol (chrysophanol) and physcion (physcion), rhein (rhein), chrysophanol anthrone (chrysophanol anthrone).