Japanese Knotweed

Stressed plant

Reynoutria japonica

wild-harvested · invasive-stress · root-extract

The highest known plant source of trans-resveratrol, concentrated in the root. Invasive in North America and Europe; wild harvest is encouraged. Most commercial resveratrol supplements derive from this root.

Compounds in this food

ResveratrolPrimary

sirtuin

1000–5000 mg/100g dry root

View compound →

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Research citations

Isolation and identification of stilbenes in two varieties of Polygonum cuspidatum

Vastano BC et al. · Journal of Agricultural and Food Chemistry · 2000

peer-reviewedDOI →

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