Malic acid is a naturally occurring acid that is synthetically produced for use as an acidity regulator, color stabilizer, and flavoring agent. It is responsible for the sour flavour of extreme sour candies, being more sour than citric acid.
Excessive consumption of malic acid, particularly through extreme sour candies, can cause irritation and sores to the mouth and tongue. Otherwise no side effects are reported from moderate intake.
Fruit juices, sour candies, naturally occurring in fruits and vegetables, canned fruit and vegetables, vegetable juice, frozen desserts, vinegars, sauces, soups, beverages, candies