Vitamin D, found in fish and produced by sun exposure, can help stave off the mental decline that can affect people in old age, a study has suggested.
UK and US researchers looked at 2,000 people aged 65 and over.
They found that compared to those with the highest vitamin D levels, those with the lowest were more than twice as likely to have impaired understanding.
"We need to investigate whether vitamin D supplementation is a cost-effective and low-risk way of reducing older people's risks of developing cognitive impairment and dementia."
"Diet is known to influence dementia risk. The best way of reducing your risk of developing dementia is to maintain a balanced diet with regular exercise and frequent social interactions."
"We look forward to seeing the published results of this new research to help us better understand the potential role of vitamin D in reducing risk."
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