Milk thistle protects the liver and treats gallstones and psoriasis. Milk thistle is native to Europe and parts of the United States. There are no known toxicities to man but it is toxic in cattle and sheep.
Sources in the Diet
-  – Herbal Drugs and Phytopharmaceuticals: A Handbook for Practice on a Scientific Basis With Reference to German Commission E Monographs
-  – The New Encyclopedia of Vitamins, Minerals, Supplements, and Herbs