Sour foods are characterized by their sharp, tangy taste, which is primarily due to the presence of acids, such as citric acid in lemons and acetic acid in vinegar. These foods can stimulate the taste buds and often enhance the flavors of dishes. Common examples include pickles, sour cream, and grapefruits. The sour flavor can also have health benefits. Many sour foods are rich in vitamins, particularly vitamin C, and can aid digestion. Additionally, they may promote the growth of beneficial bacteria in the gut, contributing to overall digestive health.