Second, beer has high water content, which can quench thirst; At the same time, the organic acids in beer have a refreshing effect. On the one hand, it can reduce excessive excitement and tension and promote muscle relaxation; On the other hand, it can stimulate nerves and promote digestion; In addition, the content of sodium, alcohol and nucleic acid in beer is low, which can increase the blood supply to the brain, dilate the coronary artery, and accelerate the metabolic activity of the human body through the stimulation of the kidney provided by the blood. Moreover, beer also has the function of "preventing diseases". According to the experiment of California Medical Center, compared with alcoholics and alcoholics, moderate beer drinkers can reduce the chances of heart disease and ulcer, and prevent diseases such as hypertension.