Malic acid is a dicarboxylic acid that occurs naturally in various fruits, particularly apples, where it contributes to their tart flavor. It plays a crucial role in the Krebs cycle, a key metabolic pathway for energy production in living organisms. In food and beverages, malic acid is used as an acidulant, flavor enhancer, and preservative. It is known for its ability to enhance the taste of products and is often found in candies, soft drinks, and fruit-flavored products. Additionally, malic acid has potential health benefits, including improving exercise performance and reducing muscle fatigue.