Brewers' ingredients include malts, which are grains that have been germinated and then dried. Malts are used to provide the sugars needed for fermentation in beer production. Other brewers' ingredients include hops, yeast, and water. Hops are used to add bitterness and flavor to beer, while yeast is used to convert the sugars from the malts into alcohol. Water is also an essential ingredient in beer production, as it makes up the majority of the beer's volume.