The first link is to an article about the definition of "natural flavor" that is more than ten years old. The second is about natural versus artificial flavor. The third is the legal definition of flavor from the USDA.
So, again, can anyone provide an actual, verifiable example of a product where gluten was hidden in flavor, whether natural or artificial?
is Scotts listing showing it may or may not contain gluten along with:
6) According to 21 C.F.R. S 101,22(a)(3): [t]he terns natural flavor or natural flavoring means the essential oil, oleoresin, essence or extractive, protein hydrolysate, distillate, or any product of roasting, heating or enzymolysis, which contains the flavoring constituents derived from a spice, fruit or fruit juice, vegetable or vegetable juice, edible yeast, herb, bark, bud, root, leaf or similar plant material, meat, seafood, poultry, eggs, dairy products, or fermentationproducts thereof. Whose significant function in food is flavoring rather than nutritional.
I think its obvious some have more problems with this than others. Also some have more faith in labeling and adherence to laws than many others. In my job I see almost daily abuse of a wide variety of labeling laws in Hawaii, including USDA organic and country of origin labeling laws. I would always err on the side of caution when it comes to recommendations regarding what new celiacs might ingest.