Tart cherries, also known as sour cherries, are small, red fruits that have a tangy flavor. They are commonly used in cooking and baking, especially in pies and jams. Tart cherries are rich in antioxidants and vitamins, making them a healthy addition to the diet. These cherries are typically harvested in the summer and are often found in juice or frozen forms, as they have a short shelf life. They are also popular for their potential health benefits, including reducing inflammation and improving sleep quality due to their natural melatonin content.