Rum is a consumable spirit derived from sugarcane. Either fresh cane juice or water added to cane syrup or molasses is used as a base, which is then fermented and distilled to an alcohol ranging from 80 to 150 proof (roughly 40 percent to 75 percent alcohol). Unlike spirits made from other sources, such as grains, the conversion of starch to sugar (critical for fermentation to occur) is not necessary when making rum. Rum is also unique in that it can be made either as a white (colorless) spirit, like vodka or gin, or as a brown spirit, like brandy or scotch. Consequently, rum is the most versatile of liquors and is the top-selling distilled spirit in the world.