Bilberry Fruit - Anthocyanins, the deep blue pigments abundant in bilberries, have been the subject of a great deal of research, especially with respect to their potential applications in maintenance of healthy eyes, circulation and connective tissue. Bilberry anthocyanins also possess powerful antioxidant properties. Bilberries have the highest content of naturally-occurring anthocyanins of any plant. The average content in dried bilberries has been reported to be approximately 2.9%, compared to 4.3% in the freeze dried bilberries used by Terranova.