Cell therapy works with the human body’s natural system to encourage physical regeneration. Cell therapy entails introducing healthy cellular material, derived from organs, fetuses, or embryos of animals, to the human body. This may be performed through bone marrow transplants, blood transfusions, or the injection of cellular material. Methods of cell therapy include the use of freeze-dried cells, whole embryo preparations, live cells, and cells from specific organs. Cell therapy is used to counteract the effects of aging, to stimulate healing, and to treat degenerative diseases such as cancer, arthritis, atherosclerosis, and Parkinson’s disease, although supportive research remains preliminary. Cell therapy is employed in various parts of Europe but has not yet been approved in the United States.