Ascorbic acid is a naturally occurring compound that is often used as a food additive. It is a form of Vitamin C that acts as an antioxidant and helps to prevent browning in fruits and vegetables by slowing down the oxidation process. As a food additive, ascorbic acid is used to preserve the color, flavor, and freshness of foods, and is commonly used in canned fruits and vegetables, fruit juices, and fruit-based products. It can also be used in baking as a dough conditioner.