You may wonder why you haven’t heard of pellets. Pellets are not patented and have not been marketed in the United States for financial reasons. They are frequently used in Europe and Australia where pharmaceutical companies produce pellets. Most of the research on pellets is out of Europe and Australia. Pellets were frequently used in the United States from about 1940 through the late 70’s when oral patented estrogens were marketed to the public. In fact, some of the most exciting data on hormone implants in breast cancer patients is out of the United States. Even in United States, there are clinics that specialize in the use of pellet implants for hormone therapy. For more about this controversy, please click: The History and Politics of BHT.