Walnuts are the only nuts which contain significantamounts of omega-3 fatty acids.
They may also help head off dementia. An American study found that walnut extract broke down the protein-based plaques associated with Alzheimers disease.
Researchers at Tufts University in Boston found walnuts reversed some signs of brain ageing in rats.
Dr James Joseph, who headed the study, said walnuts also appear to enhance signalling within the brain and encourage new messaging links between brain cells.!