Theory of aging are more than three hundred kinds, reflecting the
factors that cause aging are not single, but the decision by many
factors, free radicals, but is a factor of a lot of work, but it
caused a considerable decline in the play but important role. So far
this theory has been very rich and strong evidence. Although other
theories of aging and the strengths of their theoretical basis,
gallbladder isolated some theories emphasize one aspect of Fox, or
some conflict between the doctrine that only the free radical theory
can be linked to many theories become the center of many theories.
Human memory in a clear radical defense system, mainly by the
superoxide dismutase (SOD) and peroxidase. Older cells, anti-free
radical activity decreased, the dangers of free radicals that
significantly enhanced. Antioxidant vitamins C and E also has
anti-free radicals.
Harman 1956, the first American scholars free radicals can cause aging
put forward the idea, then as the deepening of research, has formed a
relatively systematic "free radical theory." The doctrine that: in the
normal metabolic processes of cell biology continue to produce free
radicals, but they may be the intracellular defense system quickly
removed, and thus will not cause significant damage to the cells.
However, many factors such as ionizing radiation, oxidative and
environmental pollution often induced by abnormal production of free
radicals and accumulation, while a large accumulation of free radicals
will be for many biological macromolecules and cells of the stochastic
damage, which lead to apoptosis.
