Genetically modified crops may make food more nutritious by adding genes to produce more vitamins that the body needs for health and growth . For example,a kind of rice called golden rice has been genetically modified to contain vitamin a . Regular rice does not have vitamin a, and some people who live mostly on rice are missing this important vitamin . This new rice can make a big difference to those people . Modifying potatoes to contain less starch would make French fries healthier because they would not absorb so much fat in the cooking . GM vegetables of the future may be produced with added nutrients to help fight heart disease and cancer.