ms x has heart condition that requires her to take the prescription drug coumidin, an antioxidant. while discussing with you during a counseling session one day, she mentions that she has started taking an antioxidant supplement that is supposed to boost cardiovascular health. you ask to see the supplement and note that it contains 1500mg vitamin e as alphatocopherol, 500 mg vit c, 3000 rae of beta carotene and 150 ug selenium. should you be concerned? why or why not. explain you answer.