Ouzo is a protected designation for an exclusivly in Greece produced brandy which is destilled twofold or treeefold by addition of anise oil and other components like cinnamon, ginger, fennel. The alcohol content range from 37.5 per cent by volume EU), mostly 40 up to 46 per cent by volume.
Ouzo is likewise the turkish raki which has, however, a higher alcohol content and no other components except anise. Ouzo opalised at lower alcohol contents because of the fallout of the water insoluble anise cristals. At higher alcohol contents ouzo is a clear liquid. It is drunken almost pure or on the rocks with ice, but also diluted with water where the opalic effect arises. A refrigerated storage should be avoided because quality losses (precipitation) may occur.