Eating sardines may slow the brain's aging and protect against Alzheimer's disease.
Eating oily fish such as mackerel and sardines may ward off Alzheimer's disease and can delay elderly people's brains' aging by two years, a study suggests.
Research of more than 1,100 elderly women found that those who consumed high levels of omega-3 fatty acids, which are found in oily fish, had larger brains.
Blood samples were used to measure the amount of omega-3 in the body. Eight years later the women, who had an average age of 78 by this time, underwent brain scans. Those whose levels of fatty acids were more than double the average had brains that were 0.7 per cent larger.