What is the best antacid?

The best antacid is 1/2 teaspoon of baking soda in a 1/4 cup of lukewarm water, drink it fast it tastes terrible but you will get fast results. To see how well baking soda neutralizes acid pour a solution of 2 tablespoons of it mixed in 1/4 cup of water over a corroded battery terminal on a cars battery and you will see it in action and see how well it cleans up the corrosion.