Kikkoman Gluten-Free Soy Sauce Is Made With Soybeans, Rice, Salt And Water. These Four Simple Ingredients Are Brewed And Aged For A Rich And Savory Taste. Our Soy Sauce Is Has The Same Flavor-Enhancing Qualities Of Traditional Soy Sauce But Is Certified Gluten-Free. Each 10 Oz. Bottle Of Soy Sauce Is Preservative-Free.