Malic acid is a naturally occurring organic compound found in various fruits, particularly in apples. It plays a crucial role in the Krebs cycle, a key metabolic pathway that helps produce energy in living organisms. Malic acid is responsible for the tart flavor in many fruits and is often used as a food additive to enhance taste. In addition to its culinary uses, malic acid is also utilized in the cosmetic and pharmaceutical industries. It is known for its potential benefits in skin care, as it can help exfoliate and improve skin texture. Furthermore, malic acid is sometimes taken as a dietary supplement for its possible energy-boosting properties.