Love to eat crispy roasted nuts and potato wafers that are high in salt? Beware besides harming your heart it may also harm your brain and lead to dementia researchers have warned. In mice the high-salt diet reduced the resting cerebral blood flow by 28 per cent in the cortex and 25 per cent in the hippocampus -- brain regions involved in learning and memory. This impairment in the blood flow to the brain was caused by a decrease in the production of nitric oxide -- a gas generated by endothelial cells -- the findings showed. We discovered that mice