A number of risk factors including obesity, smoking and high blood pressure have been blamed for dementia in one in three cases.

A report last week was the first time scientists have been able to show how much of the disease is preventable.

They warned people should not see dementia as “an inevitable part of ageing” but take responsibility for reducing their own risk.

In the journal The Lancet, experts recommended a major crackdown on high blood pressure which could help prevent one in 50 dementia cases. Ensuring universal education to age 15 would cut the number of dementia cases by 8%.

In middle age, treating hearing loss would have the biggest impact, cutting cases by 9%. Stopping smoking in those aged 65 and older would stop 5% of cases and treating depression would prevent 4%. - Daily Mail