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Brain function can start declining 'as early as age 45'

The brain's ability to function can start to deteriorate as early as 45, according to a study in the British Medical Journal.

University College London researchers found a 3.6% decline in mental reasoning in women and men aged 45-49.

Previous research had suggested that cognitive decline does not begin much before the age of 60.

Clive Ballard from the Alzheimer's Society spoke to the BBC about the study.

Sophie Hutchinson reports.

  • 06 Jan 2012
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