The mitochondrial theory of aging states that aging is due to the decay of tiny bodies within cells that supply the necessary energy for function, growth, and repair. There are two types of mitochondrial theory of ageing: free radical and non-free radical. The first is a variation on the free radical theory of ageing.
It was developed in the works of A. V. Linnan and was developed by J. Michel in 1980. (1989). A. N. Lobachev proposed the second in 1978. According to the mitochondrial free radical theory of ageing (MFRTA), free radicals created by mitochondrial action damage cellular components, resulting in ageing.
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