Approximately 50% of the world’s citric acid production is used as a flavor enhancer in beverages. Citric acid is used in soft drinks, teas, juices, and other beverages to create a slightly tart, refreshing flavor and balance sweetness.The acidic pH of citric acid also makes it useful as a preservative.Since many bacteria are unable to grow in an acidic environment, citric acid is often added to jams, jellies, candy, canned foods, and even meat products as a preservative.pproximately 50% of the world’s citric acid production is used as a flavor enhancer in beverages. Citric acid is used in soft drinks, teas, juices, and other beverages to create a slightly tart, refreshing flavor and balance sweetness. The acidic pH of citric acid also makes it useful as a preservative.