Here is one example of a natural flavor that is derived from wheat. http://dreyers.slowchurned.com/flavor.aspx?b=112&f=1670 A few years ago this ice cream was my favorite...until they added wheat

Now that the new food labeling laws are in effect, any food manufactored after Jan 2006 must contain a warning if any of the top eight allergens are part of the ingredients. Wheat is in the top eight but that still leaves us guessing when it comes to barley, rye and oatmeal. Barley is the one that is most likely to be hidden. Even rice syrup can contain barley.

Anne