According to Wikipedia Green Tea (also known as unoxidized tea) is a type of tea that is made from Camellia sinensis leaves that have not undergone the same withering and oxidation process used to make oolong and black tea. Because of this most of green teas have a much higher concentration of polyphenols, chlorophyll and antioxidants than other tea types. As you may already know green tea originated in China, but its production has spread to many countries in Asia today
White tea contains the same types of antioxidants as green tea, but in greater quantity. These antioxidants are found to have many health promoting properties including boosting cardiovascular health, helping to lower cholesterol, reducing the risk of cancer and enhancing weight loss. Interesting fact: white tea can only be called “white tea” if it comes from the Fujian province.
Oolong is a traditional Chinese tea produced through a process including withering the plant under strong sun and oxidation before curling and twisting. It combines the qualities of green and dark teas, giving it several interesting health benefits. It is known to boost metabolism and reduce stress, helping you feel great each day.
Black tea is generally stronger in flavor than any other tea. It is the most popular tea outside of Asia. There are many types of black tea available today. Most commercially available black teas are blends of black teas with different origins. Popular black tea blends include Earl Grey, English Breakfast and Irish Breakfast Tea.