<<Disclaimer: Verify this information before applying it to your situation.>> When I put the etc. in the ingredients in Oscar Meyer weiners (pork & turkey), I meant the rep. said natural flavors meant things like garlic and herbs. She said the exact flavors were a trade secret, but no gluten. (My son is not a celiac, but seems gluten-sensitive--so far, Oscar Meyer HDs haven't been a problem). I wonder why you asked about beef broth, as it isn't an ingredient here--I usually try to avoid it, because he's allergic to MSG. I'm afraid to find out any more information--pretty soon we'll be eating air burgers! Barbara Crooker