Phenolic acids are a type of organic compound characterized by a phenolic ring and a carboxylic acid group. They are widely found in plants and contribute to their color, flavor, and resistance to pathogens. Common examples include caffeic acid and ferulic acid, which are often present in fruits, vegetables, and grains. These compounds are known for their antioxidant properties, helping to protect cells from damage caused by free radicals. Additionally, phenolic acids may have health benefits, such as reducing inflammation and lowering the risk of chronic diseases. Their presence in the diet is linked to the consumption of fruits and vegetables.