Green tea is made from the Camellia sinensis plant. Its dried leaves and leaf buds are used to make several teas, including black and oolong teas. Green tea is prepared by steaming and pan-frying the Camellia sinensis leaves and then drying them. Green tea is not fermented, so it’s able to maintain necessary molecules called polyphenols, which seem to be responsible for many of its benefits. It also contains caffeine. Drinking green tea is linked to a reduced risk of clogged arteries. Drinking green tea might reduce the risk of developing high blood pressure. It might also slightly lower blood pressure in people with high blood pressure.