What are the foods that contain baker's yeast?
 Breads, pastries, pretzels, malted beverages, MSG, vinegar and condiments, some soy sauces, vinegar-containing foods and condiments and sauces, salad dressing, mayonnaise, pickles, catsup, sauerkraut, olives, and sauces such as barbeque and tomato contains baker's yeast. 