Flavonoids are polyphenolic compounds, which are ubiquitous in nature and have been
categorised into flavonols, flavones, flavanones, isoflavones, catechins, anthocyanidins and
chalcones according to their chemical structure. Currently more than 4000 flavonoids have
been identified, which were isolated from fruits, vegetables and beverages (tea, coffee, beer,
wine and fruit drinks). The flavonoids have aroused interest recently because of their
beneficial effects on human health especially reported to have antiviral, antiallergic, anti …