Soy-free dieters need to eliminate soybeans and all food items that contain by-products of soybeans. Here are the leading soy-free food suggestions: All fruit and fruit juices, all vegetables except soybeans, milk, butter, canned fish in water (like tuna), eggs, meats and seafood (not cooked with soy), meat supplements like legumes, seeds or nuts, potatoes, corn, rice, and pasta.