Puerh tea is made from the leaves of the Camellia sinensis plant. This is the same plant that is used to make white, green, red or black teas. Although the same plant of origin is used to elaborate all type of teas, the diffrents is a technological process. After harvest, the processing of pu-erh tea involves two stages. During the first stage, the tea leaves are prepared similarly to green tea. During the second stage, the leaves undergo fermentation and then prolonged storage or "aging" under conditions of high humidity. Puerh tea that is aged for a longer period of time is supposed to taste better. However, it can also smell musty or taste musty because mold and bacteria sometimes attack the tea during the long aging process. Pu-erh tea is mainly produced in the Yunnan district of southwest China.
Pu-erh tea is used to improve mental alertness and sharp thinking. It is also used to lower high cholesterol, release toxins and control weight.
Pu-erh tea contains caffeine, although not as much as other teas. Caffeine works by stimulating the central nervous system (CNS), the heart, and the muscles. Pu-erh tea also contains antioxidants and other substances that can help protect the heart and blood vessels.