Phenolic compounds are a class of chemical compounds characterized by the presence of one or more hydroxyl (-OH) groups attached to an aromatic hydrocarbon group. They are widely distributed in nature, particularly in plants, where they play crucial roles in defense mechanisms against pathogens and herbivores. In food and spices, phenolic compounds contribute to flavor, color, and antioxidant properties, enhancing both sensory characteristics and health benefits. Common examples include flavonoids, tannins, and phenolic acids, which are known for their potential health-promoting effects, including anti-inflammatory and anticancer properties.