Baking soda regulates pH, keeping things from getting overly acidic or alkaline. When baking soda comes into touch with another chemical, it neutralizes it and prevents further imbalance. For example, when vinegar is mixed with baking soda, the acidity of the vinegar stops the baking soda from becoming overly alkaline. Because baking soda is a base, it has a tendency to make other substances more alkaline. But because it is so effective at balancing acids and bases, it is used throughout cooking as a way to maintain pH balance in recipes. The same principle applies in medicine; baking soda is used to treat acid reflux disease because it balances the stomach's pH level. Baking soda is easy to use and cost-effective. It can be found near the other household cleaners on the cleaning aisle of most supermarkets. It can also be ordered online for home delivery. Baking soda is an excellent ingredient to have on hand for cleaning products and recipes that need pH adjustment.