No tea can effectively lower blood sugar. Simply by drinking tea can not play a therapeutic effect of lowering blood sugar. Tea contains caffeine, folic acid, pantothenic acid, catechins and other ingredients, which can play an auxiliary role in refreshing and waking up the brain, etc. In daily life, healthy people or patients with high blood sugar can drink tea in moderation, but drinking tea alone can not play a therapeutic effect of lowering blood sugar. People who need to lower blood sugar should use hypoglycemic drugs, such as metformin, on the basis of dietary management and physical exercise, as prescribed by the doctor, which can reduce the effect of blood sugar. Patients diagnosed with high blood sugar should be under the guidance of a doctor to standardize the use of medication, only by drinking tea can not play a role in lowering the efficacy of blood sugar.