I cannot give a positive answer, BUT kavalactones are fat soluble. Fat soluble substances stay in your system longer than water soluble ones. If you have extra fat in your body it will stay in your system for longer. An educated guess would be 2-4 weeks.
Liquid kava kava is a good stress and anxiety reliever. It aids in helping you fall asleep and stay asleep.
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I have researched this and got mixed reviews , to play it safe I would stay away from it because it is an unknown .
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