Scientists have developed a blood test, which can show the speed of ageing and give an estimate of how long a person is going to live.
The test results may be vital to life-insurance companies offering medical cover that depends on a person's lifetime risk of falling seriously ill or dying prematurely.
The controversial blood test is to go on sale to the general public in Britain later this year. It will cost just 435 pounds to keep tab on your ageing process.
The test has been designed to measure vital structures on the tips of a person's chromosomes called telomeres, which scientists believe are one of the most important and accurate indicators of the speed at which a person is ageing.
According to scientists, the test will be able to tell whether a person's "biological age", as measured by the length of their telomeres is older or younger than their actual chronological age.
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