Dark tea, is a special category of aged tea from China that is seldom available outside of Asia. As a result of its handling, dark tea has a lower antioxidant content than white or green tea. However, Chinese people credit dark tea with many powerful health benefits—especially promotion of weight loss, reduction of serum cholesterol, and cardiovascular protection. In recent years, some American celebrities (notably, Dr. Oz, a physician and medical talk show host) have publicized pu-erh (a type of dark tea) as an effective weight-loss aid and probiotic, which has increased the demand for this unique category of tea.