Arm & Hammer Advance White Extreme Whitening is specially formulated with Baking Soda and Peroxide to give you a noticeably whiter, brighter smile. The Baking Soda gently removes plaque and surface stains with a deep cleaning action, while high levels of Peroxide target tough, set-in stains with extra whitening power. Plus, Stain Defense technology actually helps to prevent new stains from setting. It's the secret to a whiter, brighter smile.