Value Twin Pack! The Standard of Purity Naturally Powered by Baking Soda Baking& Peroxide. Baking Soda Neutralizes Acid for Healthier Teeth & Gums. Your teeth and gums thrive in a neutral, non-acidic environment. The proven power of baking soda in all Arm & Hammer® toothpastes actively neutralizes acid, helping create the optimal environment for strong teeth and gums. Neutralizes Plaque Acid Results You Can Feel Working. Use - Aids in the prevention of dental decay.