Bilberry is the name of a small european blueberry. The standardized extract of bilberry has become popular in the United States as dietary supplements over the past decade. Bilberry preparations consist of the whole, dried, ripe, black or bluish- black fruit of Vaccinium myrtillus L. Some concentrated extracts are standardized to anthocyanosides, calculated as 25% anthocyanidins, but may actually contain about 37% by weight. The medicinal parts are the dried leaves, the ripe, dried fruit and the ripe fresh fruit. The plant is common to Central and Northern Europe, Asia and North America. The bilberry contains tannins, anthocyanins and avonoid glycosides.