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When taken by mouth: Knotweed is POSSIBLY SAFE when taken by mouth short-term. Three to four cups of tea per day, each prepared with 1.5 grams of knotweed powder, have been used with apparent safety.
When applied to the skin: Knotweed is POSSIBLY SAFE when used in a mouthwash twice daily for up to 2 weeks.
Special Precautions & Warnings:
Pregnancy and breast-feeding: There isn't enough reliable information to know if knotweed is safe to use when pregnant or breast-feeding. Stay on the safe side and avoid use.
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