This book focuses on dietary flavonoids and their biological activity along with their therapeutic potential. Dietary flavonoids have emerged as a safe and effective way of treating, controlling or managing various diseases. Various flavonoids have been investigated as natural, cost effective, alternate and combinatorial therapy for managing various diseases and have been found promising. Various functional foods have proven effective and beneficial for human heath due to the presence of flavonoids. Flavonoids have antimicrobial, anti-inflammatory and antioxidant properties. The antioxidant and anti-inflammatory properties result in various health benefits to consumers. Various flavonoids have been found useful for management of diabetes, obesity, metabolic diseases, cancers, bone health, gut health, renal functions, liver diseases, neurological diseases, viral infections, overall immunity and other health improvements. Scientists throughout the world are studying the mechanisms of action of flavonoids against different diseases. Besides these mentioned complications, flavonoids provide overall health benefits.