Beer Wikipedia. Beer is the oldest and most widely consumed type of alcoholic drink in the world, and the third most popular drink overall after potable water and tea. It is produced by the brewing and fermentation of starches, mainly derived from cereal grains—most commonly from malted barley, though wheat, maize (corn), rice, and oats are also used.

beer, alcoholic beverage produced by extracting raw materials with water, boiling (usually with hops), and fermenting. In some countries beer is defined by law—as in Germany, where the standard ingredients, besides water, are malt (kiln-dried germinated barley), hops, and yeast. Before 6000 bce, beer was made from barley in Sumer and Babylonia.