Flavonoids are known to have positive effects on human and animal health and are employed for disease therapy and chemoprevention.This book presents recent advances of polyphenol (flavonoids) derivatives for the management and prevention of diseases. It summarizes the classification of flavonoids and explores their potential as immunity-boosting compounds for mental health, for prevention of cardiovascular illnesses, for their antimicrobial and anti-inflammatory uses, for their use in vasodilation, for their use in dermatology and cosmetic preparation, and more. The various methods of flavonoid extraction are addressed, including the main parameters involved in extraction, such as temperature, solvent used, sample quantity, time for extraction, etc. The book also looks at the role of flavonoids in sustainable agriculture.