Citrus fruits contain a high concentration of citric acid — a naturally occurring compound found in a variety of fruits that imparts a tart, sour flavor.
Tamarind is a tropical fruit that’s native to Africa and comes from the tamarind tree.
Rhubarb is a unique vegetable, as it has a strong tart flavor that’s due to its high concentrations of malic and oxalic acids.
Tart cherries are also rich in antioxidants, particularly polyphenols. These plant compounds have been associated with reduced inflammation, as well as improved brain and heart health.
Gooseberries are small, rounded fruits that come in a variety of colors and can range in flavor from sweet to quite sour.
Raw cranberries have a sharp, tart flavor due to their low sugar content and high concentration of organic acids, including citric and malic acids.
Vinegar is a liquid made by fermenting a carbohydrate source, such as a grain or fruit, to turn the sugars into alcohol.
Kimchi is a traditional Korean side dish made from fermented vegetables and spices.
Thought to have originated in China, sauerkraut is a type of fermented cabbage that’s commonly found in German cuisine.
Yogurt is a popular fermented dairy product that’s made by adding live bacteria to milk.