Milk Thistle is excellent for the liver, but you definitely can have side-effects when using it.

My business partner took it soon after her mercury removal and had severe mood swings. I had to kindly ask that she stop taking it for awhile so we could get along again. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />Otherwise, she's the best business partner one could hope to have.