There is more evidence that vitamin D keeps the brain in good working order, with the latest British research finding a link with better memory.
A study of more than 3000 men aged 40 to79 assessed their mental agility using a range of tests, while blood samples measured vitamin levels.
The study found those with high vitamin D levels performed better on memory and information processing tests, while those who had the lowest levels - 35 nmol/litre or under - registering poor scores, said the Journal of Neurology Neurosurgery and Psychiatry.
They said vitamin D - found in fish and produced by sun exposure - could protect cells or key signalling pathways in the brain.
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