Bioflavonoids are among the most interesting, and maddeningly diverse, compounds found in nature. Found in thousands of different species, from onions to pomegranates, Bioflavonoids (from a Latin word that means "blue") are classified as polyphenols, plant metabolites that often lend plants their characteristic colors.
Their possible effects on human health are as profound as they are numerous, and for that reason can only be dealt with in the most general fashion here.