Please note: The FDA will be updating this page with new information about our efforts to modernize the Total Diet Study, in the near future. The modernization efforts include data management, methods, data quality standards, and study design improvements. In October 2017, a pilot program was initiated to test a more robust, population-based sample collection procedure. These improvements will help the FDA to continue our decades long effort to study and better understand Americans’ dietary exposure to toxic and nutritional elements, pesticides, industrial chemicals, and radionuclides.

CFSAN/Office of Analytics and Outreach

The Total Diet Study (TDS) is an ongoing FDA program that monitors levels of about 800 contaminants and nutrients in the average U.S. diet; the number varies slightly from year to year. To conduct the study, we buy, prepare, and analyze about 280 kinds of foods and beverages from representative areas of the country, four times a year.

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