1-2-3 Gluten-Free All Purpose Fortified Gluten-Free Flour Mix This multi-purpose flour mix can be used cup-for-cup for wheat-based flour in most of your family recipes. Contains rice flour, potato starch, tapioca starch, xanthan gum, niacin (Vitamin B3), reduced iron, thiamin mononitrate (Vitamin B1), riboflavin (Vitamin B2), folic acid (Vitamin B9). Available in 1.5 pound packages.