People who smoke 40-a-day face a much higher risk of dementia in later life, according to new findings.
The risk of developing Alzheimer's disease more than doubled in people who had consumed more than two packs in middle age, found the study published in Archives of Internal Medicine.
In addition, the long-term study which followed people for an average of 23 years to see how their lifestyle would affect their brain showed that the risk of vascular dementia rose by 172 per cent.
However, people who had quit smoking by the time they reached middle age or people who smoked less than half a pack per day had no more chance of developing diseases of the brain than those who had never smoked.
Dr Rachel Whitmer, who led the research, said: "We know smoking compromises the vascular system by affecting blood pressure and elevates blood clotting factors, and we know vascular health plays a role in risk of Alzheimer's disease."
According to cancer research statistics, the number of men with a smoking habit in 2008 was approximately 22 per cent while around 21 per cent of women were smokers.
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Posted by Paul Breen
