In spite of what Mother taught you about the benefits of eating broccoli, data collected by the U.S. government show that the nutritional content of America's vegetables and fruits has declined during the past 50 years -- in some cases dramatically.
Davis, who discussed his findings at a recent meeting of the American Association for the Advancement of Science meeting in St. Louis, suspects the trend in agriculture toward encouraging crops that grow the fastest and biggest is a reason for the decline. The past five decades have been marked by the "Green Revolution," which has seen a marked increase in U.S. production and yields as farmers have turned to the fastest-growing and greatest-producing plants.
The tradeoff is that the faster-growing plants aren't able to acquire the nutrients that their slower-growing cousins can, either by synthesis or from the soil. He said there also are differences in the amounts of nutrients lost in differing varieties of wheat and broccoli.
Davis said he doesn't want his study to encourage people to stop eating vegetables on the grounds they lack nutrients.
Ha ha, too late.