People who are genetically susceptible to heart disease can lower their risk by eating plenty of fruit and raw vegetables, a study suggests. It says five or more daily portions should be enough to counteract culprit versions of a gene on chromosome 9, thought to be possessed by a fifth of people of European ancestry. Healthy diets appeared to weaken its effect. The US researchers investigated more than 27,000 people for their work. The findings were published in Plos Medicine journal. These