Flavonoids are one of the major nutrient families recognized to scientists, and comprise over 6,000 already recognized family members. A number of the best - recognized flavonoids include quercetin, kaempferol, catechins, and anthocyanidins. It is well-known for its antioxidative activity, free radical scavenging capacity, coronary, hepatoprotective, anti-inflammatory and anticancer activities. Some flavonoids also exhibit potential antiviral activities. There has been rising attention in the research on flavonoids from plant sources because of their resourceful fitness benefits reported in a variety of epidemiological studies. Study on the health aspects of flavonoids for humans is growing speedily.