Carnosic acid is a natural compound found primarily in the leaves of the rosemary plant. It is known for its antioxidant properties, which help protect cells from damage caused by free radicals. This compound is often studied for its potential health benefits, including anti-inflammatory and neuroprotective effects. In addition to its health benefits, carnosic acid is also used in the food industry as a natural preservative. Its ability to inhibit the growth of certain bacteria and fungi makes it valuable for extending the shelf life of various products. Overall, carnosic acid is a versatile compound with applications in both health and food preservation.