Phenolic compounds including flavonoids are essential plant-derived metabolites with profound health benefits. Their various subclasses-including flavonols flavanones isoflavonoids neoflavonoids flavanols and anthocyanins-exhibit a wide range of biological activities such as antioxidant anti-inflammatory anti-microbial cardio-protective and anti-cancer effects. These bioactive compounds play a crucial role in disease prevention and overall health promotion by modulating oxidative stress improving vascular function and supporting immune defense. Given their natural abundance in fruits vegetables and other plant-based foods flavonoids are essential components of a healthy diet.