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Early Show contributor Dr. Mallika Marshall discussed over-dosing of some dietary supplements can be dangerous, and even lead to death, including Vitamin E and beta carotene. Dr. Marshall goes on to explain the need for supplements for pregnancy, pre-menopausal women, vegetarians, alcoholics and senior citizens. To read more, go to: http://www.cbsnews.com/stories/2008/06/07/earlyshow/health/main4161791.shtml