In 2003, researchers from the University of Colorado found that the concentration of the antioxidant EGCG available from drinking matcha is up to 137 times greater than the amount of EGCG available from other commercially available green teas. Matcha is also said to boost metabolism and help reduce cholesterol levels when drunk regularly. The aforementioned health benefits of matcha green tea can largely be attributed to the fact that the whole tea leaf is ingested, as opposed to just the steeped water in the case of 'bagged' or loose leaf green teas. This means that it delivers a much higher potency of catechins, chlorophyll, and antioxidants. By weight, matcha contains more antioxidants than blueberries, pomegranates, orange juice and spinach

There is evidence from clinical studies that suggests that theanine, when consumed by drinking Japanese green teas, may help to reduce or moderate mental stress responses.