Green teas are well known for their high antioxidant levels and ability to arrest free radicals in our bodies. Green tea includes many kinds of antioxidant polyphenols, such as flavonoids, thearubigins and epicatechins. The strongest antioxidant effects are often attributed to catechins, including EGCG which has received a great deal of media attention lately.

Recent epidemiological research strongly suggests that frequent green tea consumption reduces mortality, and studies have identified potential benefits preventing ailments as diverse as tooth decay, cancer and heart disease. Additionally, green tea includes L-theanine, a substance that has been shown to improve concentration and create a feeling of relaxation. Theanine is thought to counterbalance caffeine in tea, and is often cited as a reason that tea may make one less jittery than coffee.