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Biological clock used to help predict lifespan: Scientists

By Lucinda Cameron

Scientists have identified a biological clock that could help predict a person's lifespan.

Researchers studied chemical changes to DNA to establish an individual's biological age which they compared with their actual age.

They found that people whose biological age was greater than their true age were more likely to die sooner than those whose biological and actual ages were the same.

Four independent studies tracked the lives of almost 5,000 older people for up to 14 years. Each person's biological age was measured from a blood sample at the outset and participants were followed up throughout the study.

Researchers found that the link between having a faster-running biological clock and early death held true even after accounting for other factors such as smoking, diabetes and cardiovascular disease.

The study is published in scientific journal Genome Biology.

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