On August 17, 2006 I submitted this request to the Cleveland Clinic for a correction to its web site, specifically regarding their claim that "There is no difference between natural vitamins and synthetic vitamins". My reference relates to a known difference between natural and synthetic vitamin E (to date, no correction has been made): On your web page (http://www.clevelandclinic.org/health/health-info/docs/0900/0955.asp?index=5429 regarding Diet, Exercise, Stress, and the Immune System) you make a false statement that "There is no difference between natural vitamins and synthetic vitamins." On the NIH Office of Dietary Supplements website (http://ods.od.nih.gov/factsheets/vitamine.asp) they clearly state that "The synthetic form is only half as active as the natural form . [4} U.S. Department of Agriculture, Agricultural Research Service. 2004. USDA National Nutrient Database for Standard Reference, Release 16-1. Nutrient Data Laboratory Home Page, http://www.nal.usda.gov/fnic/foodcomp Please correct this error.