We daily see patients that need a boost in their nutrition and we advise them of such. Then we get the inevitable question, "Doc, I eat a lot of vegetables. Why am I ______(fill in the nutrient(s)of choice here, magnesium, calcium, etc) deficient? Can't I just eat some more broccoli?" And the response is that our soils are being depleted, so the food is less nutrient dense, and genetically modified (GM) foods are much more prevelent in the grocery store than any of us imagine.