Giant Knotweed (Polygonum aviculare) is a sturdy plant found growing in most temperate regions of the world. The whole of the flowering plant can be used for medicinal purposes, this includes the root. Knotweed contains flavonoids (avicularin, kaempferol, quercetin, myrecitin), and gallic acid.
Knotweed may have astringent, anti-inflammatory, antihemorrhagic, antiglycolytic, and anticholinergic activities. It has been used for broncitis, cough, sore throat, and inflammation of the mouth and pharynx. Knotweed has also been used for meopausal condition, skin disorders, and as a duiretic. The flavonoids of knotweed have been indicated for use with capillary fragility and hace a cortisone-effect on gingival tissue.
Knotweed has a variety of common names that are also used. These include Mexican Sanguinaria, Cow Grass, Birdweed, Beggarweed, Ninety-knot, Pigrush, Knotgrass, Doorweed, Pigweed, Swynel Grass, Sparrow Tongue, Red Robin, and more.
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Cautions No side effects or cautions have been reported at this time.