According to analyses conducted by the U.S. Department of Agriculture, 100 grams of fresh tomato today has 30 percent less vitamin C, 30 percent less thiamin, 19 percent less niacin, and 62 percent less calcium than it did in the 1960s. But the modern tomato does shame it's counterpart in one area: It contains fourteen times as much sodium.
Barry Estabrook, Tomatoland: How Modern Industrial Agriculture Destroyed Our Most Alluring Fruit
agriculture, factory-farming, food, science, tomatoes