All these different kinds of home brewery beer are made of the same basic ingredients. They are made of water, malted barley and hops. The differences in flavour come from the kind of hops, the malting process and the even the water that has been used in the brewing process. No matter where the beer is made and what kind it is, it must conform to rigorous purity standards. German beer is carefully regulated to preserve the quality of the product and to ensure that customers get exactly what they expect.