All tea types, except herbal, are brewed from the dried leaves. The level of oxidation of the leaves determines the type of tea. Green tea is made from unoxidized leaves and is one of the least processed types of tea. For this reason, it contains the most antioxidants and beneficial polyphenols. People used green tea in traditional Chinese and Indian medicine to control bleeding and heal wounds, aid digestion, improve heart and mental health, and regulate body temperature. Studies suggest that green tea may have positive effects on weight loss, liver disorders, type 2 diabetes, Alzheimer’s disease, and more. However, it is important to note that more evidence is necessary before scientists can definitively prove these possible health benefits.