Polygonum cuspidatum herb is a source of resveratrol
Polygonum cuspidatum herb is also known as Japanese knotweed. It grows wildly in most of the states in the US. Most of the Resveratrol supplements on the market extract this substance from the Polygonum cuspidatum plant.
Polygonum cuspidatum root
composition
Four anthraquinones, physcion,
emodin, citreorosein and anthraglycoside B, and two stilbenes, resveratrol,
and piceid, are found in the root of Polygonum cuspidatum.
Bioassay-guided separation of citreorosein and other
oestrogenic compounds From Polygonum cuspidatum.
Phytother Res. 2008 Dec 23. Textile and Material College, Xi'an Polytechnic
University, 19 Jinhua Road South, Xi'an 710048, P.R. China.
Citreorosein was isolated from Polygonum
cuspidatum as a new estrogenic compound, together with
emodin and its glucoside. Estrogenic activity was determined by a recombinant
yeast assay.
Effect of different light intensity on Polygonum
cuspidatum callus
Zhongguo Zhong Yao Za Zhi. 2007 Jul;32(13):1277-80. Agronomy College,
Sichuan Agricultural University, Ya' an 625014, China
To study the effect of light intensity (LI) on the callus induction and
resveratrol content of Polygonum cuspidatum. Taking leaves and stem segment of
Polygonum cuspidatum as explants, the callus was inducted and cultured under
different LI. The growth status of callus was observed and analyzed. The content
of resveratrol was determined by HPLC. The formation and growth of the stem
segment callus were optimal under low light treatment (1340-1560 lx). The
resveratrol content was 18.350 microg x g(-1) in fresh stem segment and 140.074
microg x g(-1) in dry stem segment, which was two times higher than that of wild
P. cuspidatum. Introduction and status of Polygonum cuspidatum callus were
obvious diverse under different LI, the resveratrol content of P. cuspidatum was
enhanced under appropriate LI.
Polygonum
cuspidatum
questions
Q. On a website on polygonum cuspidatum a writer said of not thinking that
this herbs effects kidneys. This plant contains large quantities of oxalic acid
and I believe that it is generally accepted that for those people with kidney
stones or a genetic propensity towards same, oxalic acid consumption is
discouraged. As Polygonum cuspidatum is at times eaten as a whole plant (leaves,
seeds, roots) there will be meaningful consumption of oxalic acid.
A. A Medline search for the terms " Polygonum cuspidatum oxalic
acid "did not reveal any studies. The amount of herbs that are ingested as
supplements are very small, and any potential exposure to oxalic acid would be
minimal compared to oxalic content of certain foods such as spinach.