Ds has multiple severe IgE allergies. (He can react to trace trace amounts of an ingredient and has an epi-pen for 5 different foods because his allergies are so severe.) His diagnosed allergies right now are: soy, peanut, tree nut, wheat, milk, egg, and some other legumes.
Away from home, he is allowed single ingredient foods only (ie., a banana or something). At home, I am very careful what ingredients I use and possible cross-contamination. I'd like to make a recipe calling for worchestershire sauce. I'm a little concerned with the "natural flavors." Does it contain any allergens? I hate to try it and wait for a reaction given how severe his reactions are.