The benefits are not great, and the losses are full. Anything in excess is harmful, and Pu 'er tea is no exception. The fluorine content of aged Pu 'er is too high, and excessive quotation will easily lead to calcium deficiency. Drinking a lot of tea will stimulate the stomach and affect the digestive system; Excessive drinking tea at night will make people excited and affect their normal rest. Therefore, moderate drinking of Pu 'er tea is good for your health, while excessive drinking of tea will affect your health.