Expatriate health insurance policyholders can help ward off dementia by eating purple fruits, according to a new study.
Scientists at the University of Manchester found that fruits such as blueberries play a role in tackling Alzheimer's and a range of other diseases, including Parkinson's and Multiple Sclerosis.
They discovered that most debilitating diseases are caused partly by poorly-bound iron, which causes the body to produce dangerous toxins called hydroxyl radicals.
Nutrients known as iron chelators, which are found in purple berries and other brightly-coloured fruits and vegetables, can protect against these toxins by binding iron more effectively.
Professor Douglas Kell, author of the report, said that if the findings prove true, they could "change greatly the means by which we seek to prevent and even cure such diseases" as Alzheimer's.
According to the Alzheimer's Society, there are currently 750,000 people in the UK living with dementia, while two thirds of sufferers are women.
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