Cook with olive oil, add it to salads, and dip bread in it. Those who do are 41 per cent less likely to suffer a stroke than those who never eat it. Researchers using almost 8,000 people have concluded that all older people will live longer if they eat penty of it. The Mediterranean Diet, one of the healthiest out there, relies heavily on olive oil and is regarded as the classic eating habit in countries such as France, Greece, Spain and Italy. Cecilia Samieri, of the National Institute of Health and Medical Research in Bordeaux, where the survey was done, said: "Stroke is so common in older people and olive oil would be an inexpensive and easy way to help prevent it. Besides the health benefits that olive oil provides, it tastes good too.