Virtually all fresh fruits and vegetables have alkalizing effects on your body because they are able to donate electrons to the hydrogen ions within acidic solutions and neutralize them. According to “Superfoods: The Healthiest Foods on the Planet” by Tonia Reinhard, the most alkalizing fruits are sour cherries, watermelon and citrus fruits, especially lemons and limes, while watercress, celery, alfalfa and wheatgrass are the most alkalizing vegetables. Blueberries, cranberries and overly ripe bananas are about the only fruits that are considered slightly acidic. Dairy products can neutralize acid in your stomach, but their fat and protein content can lead to acidifying effects when consumed in large quantities. All animal-based protein has acidic effects in large quantities, but in moderation, it is considered part of a healthy diet. In general, alkalizing foods should represent about 75 percent of your diet. The most alkalizing beverages are purified water and freshly squeezed fruit and vegetable juices.
Read more: http://www.livestrong.com/article/518365-what-foods-to-eat-for-hyperacidity