Japanese Knotweed
Japanese knotweed (Polygonum cuspidatum) is a fast-growing perennial plant from East Asia. Its root is a main commercial source of resveratrol.
Also listed as Hu zhang, Polygonum cuspidatum, Bambou Japonais, Japanese Knotwood
What changed in the human trial?
Twenty healthy adults received placebo or knotweed extract for six weeks. Several inflammation and oxidative-stress measurements improved with the extract. These were blood and cell measurements, not tests of pain relief, infection prevention or longer life. The findings justify further research without answering those everyday health questions. 1
A small trial found favorable marker changes; clinical benefits remain uncertain. 1
Laboratory measurements improved in healthy adults in one short trial. 1
Effects by health goal
Open an effect to see the studies behind its rating. Bars show the size of the effect; the letter grades the evidence.
Longevity1 effect
No study is linked to this rating.
Immune Support2 effects
No study is linked to this rating.
No study is linked to this rating.
Cardiovascular2 effects
No study is linked to this rating.
No study is linked to this rating.
Bone & Joint1 effect
No study is linked to this rating.
Gut Health1 effect
No study is linked to this rating.
Hair & Skin1 effect
No study is linked to this rating.
Other effects1 effect
No study is linked to this rating.