Bicarbonate soda or baking soda is a base and has a pH of 9.0. Base substances like baking soda work by absorbing hydrogen ions in acidic substances. Mix a teaspoon of baking soda with a cup of water and drink it quickly, and it will help prevent excess stomach acid from forming or coming up the esophagus. Use it sparingly, as it can have a laxative effect. Do not exceed seven half-teaspoon doses within 24 hours.

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