All natural. No preservatives added and gluten free. Louise Lamb started the Grist Mill in the late 60's. Her vision of offering wholesome stone ground all natural corn products to the consumer is our mission. We offer the same all natural cornmeal processed in a gluten-free facility in Converse, Texas. Lamb's Stone Ground Corn Meal is best when stored in the refrigerator or freezer. Shelf life is 1 year.