What do regulatory agencies, such as the FDA and FSA advise with regard to evaluating and buying dietary supplements?The United Kingdom Food Standards Agency provides free consumer information at <a href="http://www.food.gov.uk/safereating/chemsafe/supplements/consumer/The">http://www.food.gov.uk/safereating/chemsafe/supplements/consumer/The</a> United States Food and Drug Administration (FDA) offers ???Tips for Dietary Supplement Users??? at http://www.fda.gov/Food/DietarySuppl