This is because theanine and tea tannin contained in tea can excite the central nervous system, promote human metabolism, accelerate blood circulation and eliminate physical fatigue.
As we all know, tea can refresh us. Whenever you are tired, drinking a cup of tea will often cheer you up. This is because theanine and theatannin contained in tea can excite the central nervous system, promote the body's metabolism, accelerate blood circulation, and thus eliminate physical fatigue.