Do high doses of Valerian root extract damage the liver?

I can't get a straight answer anywhere. It seems that hepatoxicity has been reported after ingestion of high doses, but that this was probably attributable to other substances taken with the valerian as a mixture of anxiolytic herbs. On the other hand, I have read that valerian extract alone may cause... show more I can't get a straight answer anywhere. It seems that hepatoxicity has been reported after ingestion of high doses, but that this was probably attributable to other substances taken with the valerian as a mixture of anxiolytic herbs. On the other hand, I have read that valerian extract alone may cause hepatoxicity because valerian supplements may contains contaminants.

Can someone help me out? 10 points for a good answer.
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