Many Supplements Said to Contain Toxins, Make False Health Claims
by Health Day
Published May 26, 2010

http://www.healthday.com/Article.asp?AID=639515

A Congressional investigation of herbal supplements has found trace amounts of lead, mercury and other heavy metals in nearly all products tested, plus myriad illegal health claims made by supplement manufacturers, The New York Times reported Wednesday.

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Yet another reason not to self medicate with herbals.

Just cause it's "herbal" doesn't mean it's good for you.