"Polyphenols are naturally present compounds in fruits and vegetables that constitute one of the most common and widespread groups of natural products due to their therapeutic effects and potential technological applications. Polyphenols have a wide range of pharmaceutical, environmental, biological and industrial applications. They represent a prominent effect in diagnosing and preventing numerous diseases, including diabetes, obesity, Parkinson's, Alzheimer's, and so on. They have also been widely used in food preservation, to improve the physicochemical properties of starch, such as natural dyes, prebiotic ingredients, hydrogels, and nanocomplexes. In addition, polyphenols have the potential for innovation in the most diverse technological fields, including organic fine chemistry, basic materials chemistry, and chemical engineering"-- Provided by publisher.