<<Disclaimer: Verify this information before applying it to your situation.>>

From another listserv:
From the Food Allergy Network website:

Ingredients in Natural Flavorings
              Take the opportunity to voice your concern about the
importance of listing the ingredients for "natural flavorings." Address your
letters to:
         Director for the Center of Food Safety and Applied Nutrition
Joseph Levitt
        FDA
        200 C Street, SW
        Washington, DC 20204