A distilled beverage, liquor, or spirit is a drinkable liquid containing ethanol that is produced by means of distilling fermented grain, fruit, or vegetables.This excludes undistilled fermented beverages such as beer and wine. Beer and wine were historically limited to a maximum alcohol content of about 15% ABV. Most yeasts cannot reproduce when the concentration of alcohol is higher than 15%; consequently, fermentation ceases at that point, preventing the production of more alcohol. Fortified wines are created by adding a distilled beverage (usually brandy) to a wine.