With too much acid, we pucker; with too little, foods taste flat. The term pH stands for the "power of hydrogen" which measures the acidity or alkalinity in foods, beverages, and more. The total pH scale ranges from one to 14, with seven considered to be neutral. The following foods fall on the acidic end of the pH spectrum. Click the link in bio to learn about how to enhance a dish with acidic ingredients, other ways you can use acidity besides adding flavor to a meal, and more.