Please visit our tea shop in Chinatown and try both the sheng and shou pu-erhs. The sheng is good for energy, but does have more caffeine; while the shou is for calming and has low caffeine. I would recommend that you get one of each kind, drink the sheng during the day time and shou in the evening. Both are good for lowering the cholesterol and digestion and for loosing weight. We do affordable pu-erhs in different sizes and ages. Please come and choose.