Bob's Red Mill® Double Acting Baking Powder. An employee-owned company. To your Good Health®. Bob Moore. Gluten free. No added aluminum. You can see our quality! Bob's Red Mill double action baking powder releases carbon dioxide when exposed to moisture and heat, causing doughs and batters to rise. Baking powder is perishable and should be kept cool and dry. Wholesome. Dear friends, Since starting this company over thirty years ago, our mission has always been to offer the most diverse array of stone ground, whole grain products. About ten years ago, we noticed that some folks were exclusively buying gluten free grains like brown rice, sorghum and quinoa. Soon after that, we learned all about celiac disease and gluten intolerance and how serious they are to millions of people like you. Over the years we have introduced a variety of measures to ensure purity in our line of gluten free products that have become industry standard. We inspect all farm deliveries, use dedicated gluten free production facilities and employ batch testing in our quality control laboratory. Knowing that we're providing safe and delicious gluten free foods that you and your family can trust makes it all worth the effort. To your good health, Bob Moore. To learn more about our gluten free products visit www.bobsredmill.com/gluten-free. Bob's Red Mill products labeled gluten free are batch tested in our quality control laboratory. We use an elisa gluten assay test to confirm that a product is gluten free.