Acidic foods are those that have a low pH level, typically below 7. These foods can taste sour and include items like citrus fruits, tomatoes, and vinegar. The acidity in these foods can enhance flavors and is often used in cooking to balance dishes. Consuming acidic foods can have various effects on the body. For example, they can stimulate digestion and may help with nutrient absorption. However, excessive consumption of highly acidic foods may lead to issues like acid reflux or tooth enamel erosion, so moderation is key.