Life extension science, also known as
anti-aging medicine,
indefinite life extension,
experimental gerontology, and
biomedical gerontology, is the study of slowing down or reversing the
processes of aging to extend both the
maximum and
average lifespan. Some researchers in this area, and "life extensionists", "immortalists" or "longevists" (those who wish to achieve longer lives themselves), believe that future breakthroughs in tissue
rejuvenation,
stem cells,
regenerative medicine,
molecular repair,
gene therapy, pharmaceuticals, and
organ replacement (such as with artificial organs or
xenotransplantations) will eventually enable humans to have indefinite lifespans (agerasia) through complete rejuvenation to a healthy youthful condition.