Outline of life extension

Life extension is the study of slowing down or reversing the processes of aging to extend both the maximum and average lifespan. The ability to achieve this, however, does not currently exist. 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 with stem cells, molecular repair, and organ replacement (such as with artificial organs or xenotransplantation) will eventually enable humans to have indefinite lifespans through complete rejuvenation to a youthful condition.

History

The quest for eternal youth is not a new one. The ancient Greeks had myths about the Fountain of Youth and Eternal Youth. In the modern era, the concept of life extension started to become more mainstream with the advent of the scientific method and the understanding of human biology.

Theories of aging

There are several theories of aging, including the Free-radical theory of aging, the Mitochondrial theory of aging, the Telomere theory of aging, and the Hormesis theory of aging. Each of these theories provides a different perspective on the causes of aging and potential ways to slow the aging process.

Life extension methods

There are several methods that are proposed to extend life. These include Caloric restriction, Genetic modification, Anti-aging drugs, Hormone replacement therapy, and Nanotechnology. Each of these methods has its own set of potential benefits and risks.

Ethical considerations

There are many ethical considerations when it comes to life extension. These include the potential for overpopulation, the disparity in access to life extension technologies, and the potential for extended life to lead to extended suffering.

See also

• Biogerontology
• Cryonics
• Senescence
• Rejuvenation (aging)
• Sirtuin