PolyphenolsUnderstand polyphenols and their benefits with this comprehensive overview Polyphenols are a group of beneficial compoundsincluding phenolic acids, flavonoids, anthocyanins, and othersthat can be found in a vast range of plants and plant based foods. Their health benefits and the variety of their applications in functional foods, dietary supplements, and similar areas have made polyphenols a $1 billion market, a figure that is expected to more than