Citric acid is a natural and versatile ingredient that is widely used in various industries, including food, beverage, cosmetic, and pharmaceutical. 
In the food and beverage industry, citric acid is used as a flavor enhancer, acidity regulator, and preservative. It is commonly found in soft drink, fruit juices, candies, and other processed foods. Citric acid provides a sour taste that adds a refreshing tanginess to food and drinks.