Read article here: Nutritional Value of Fruits and Veggies is Dwindling
The article focuses on fertilizer and how fast things are grown which is definitely part of the picture but what else is going to happen with GMO products and those who put profit, and appearance above nutrition in the growing of these vegetables? They have genetically modified them to last the longest for transport and have the most smooth and uniform appearance. [vitamins and minerals are thrown by the way side]
Years ago, I was talking to a friendly local farmer, who told me, you know, vegetables are not as nutritious as they used to be and our soil is depleted beyond the pale, I believed him. Eating heirloom vegetables that were bought from an organic farmer, the flavor of them burst in my mouth, and an energized feeling came over my body, honestly this was not imagined. Food that actually has enough vitamins and minerals makes you feel better. Years ago the alternative and nutritional press would bring these things up, so its interesting its now hitting the national mainstream news.
My advice is to get as much of the "real stuff" as you can afford: veggie markets, growing your own garden, because better nutrition overall will equal better health. As I said before, one wonders how the lack of nutritional oomph in our food is affecting obesity?