Some consumers may choose veganism, or a pescatarian diet, but meat, eggs and milk, offer crucial sources of much-needed nutrients which cannot easily be obtained from plant-based foods, a new report issued on Tuesday by the UN’s Food and Agriculture Organization says.
Yes, there is rice that is genetically modified, fortified, or both, to improve it's nutritional profile. Where I live, pretty much all the grains and staple foods you buy at the supermarket are fortified with nutrients to fight malnutrition.
But at the end of the day rice is rice, flour is flour and corn is corn. There is only so much that can be done. One of the limits of fortification of iron for instance, is that only non heme iron can be used in most cases. This is less absorbed by the body than heme iron. Not something most healthy people eating enough whole foods have to think about, but if a person is already eating too little food, stuff like that matters.