Fruits, vegetables, grains, bark, roots, stems, flowers, tea, wine, and other naturally occurring foods as well as medicinal plants include flavonoids, a class of compounds with varied phenolic structures. The health benefits of these natural chemicals are well known, and attempts are being done to identify the so-called flavonoid components. Flavonoids are regarded as a crucial component in a wide range of nutritional, pharmacological, therapeutic, and aesthetic applications.