Just because they are bigger than they used to be, doesn't mean they're as nutritious. According to data collected by the USDA, non-organic vegetables have fewer vitamins and minerals than they did 50 years ago. On an overall scale of all produce tested, protein has declined by six percent, iron has declined 15 percent, vitamin C has dropped 20 percent, and riboflavin has fallen by 38 percent. An analysis of the nutritional drops was published in the Journal of the American College of Nutrition and suggests the loss is due to the increased cultivation of crops that were bred for high growth and production and not for nutritional value.
Learn more: http://www.organicconsumers.org/politics/FEED060417.cfm