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Knotweed (Common Knotweed)

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  • Common Name: Knotweed (Common Knotweed)
  • Latin Name: Persicaria spp./Polygonum arenastrum spp.
  • Family Name: Polygonaceae
Contains oxalic acid which binds to much-needed calcium and minerals, thus preventing their absorption.  It also contains tannins and has diuretic tendencies, so one to avoid. 

Not to be confused with Japanese Knotweed, which should also be avoided.  Also see Persicaria
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