Matcha is fine green tea powder made from shade-grown tea bush leaves. From East Asia, it is a concentrated green tea possessing its same antioxidant properties but multiplied. Caffeine too is more concentrated which Japanese Zen monks over centuries have used to stimulate alertness. Surprisingly, Theanine, a main constituent, has a simultaneous effect of relaxation. Therefore, Matcha provides a less jittery boost of energy than coffee with no crash at the end.