Vitamin D 'key to healthy brain'

It's "key."

"Scientists have produced more evidence that vitamin D has an important role in keeping the brain in good working order in later life.

A study of over 3,000 European men aged 40-79 found those with high vitamin D levels performed better on memory and information processing tests.

The University of Manchester team believe vitamin D may protect cells or key signalling pathways in the brain."

Just as it is key in preventing prostate cancer, I'll bet.