Citric acid is a weak organic acid that is commonly found in citrus fruits like lemons, limes, and oranges. It has a tart, acidic taste and is often used as a flavoring or preservative in food and beverages.

In food and beverage production, citric acid is often used to add a sour or acidic taste, or to enhance the flavor of other ingredients. It is also commonly used as a preservative to prevent spoilage and extend the shelf life of products like canned fruits, jams, and soft drinks.

Citric acid has some potential health benefits as well. It is a source of vitamin C, which is important for immune system function and skin health. Citric acid may also help improve the absorption of minerals such as calcium, and has been shown to have antioxidant properties.

Citric acid is generally recognized as safe (GRAS) by the US Food and Drug Administration (FDA) when used in moderate amounts in food and beverages. However, consuming large amounts of citric acid may cause digestive discomfort or other side effects in some individuals, particularly those with a history of kidney stones or other kidney problems. As with any food or supplement, it's important to consume citric acid in moderation as part of a balanced diet.