Americans eat more chicken and less beef than they used to. They drink less milk – especially whole milk – and eat less ice cream, but they consume way more cheese. Their diets include less sugar than in prior decades but a lot more corn-derived sweeteners. And while the average American eats the equivalent of 1.2 gallons of yogurt a year, he or she also consumes 36 pounds of cooking oils – more than three times as much as in the early 1970s. //

Broadly speaking, we eat a lot more than we used to: The average American consumed 2,481 calories a day in 2010, about 23% more than in 1970. That’s more than most adults need to maintain their current weight, according to the Mayo Clinic’s calorie calculator. (A 40-year-old man of average height and weight who’s moderately active, for instance, needs 2,400 calories; a 40-year-old woman with corresponding characteristics needs 1,850 calories.)

Nearly half of those calories come from just two food groups: flours and grains (581 calories, or 23.4%) and fats and oils (575, or 23.2%), up from a combined 37.3% in 1970. Meats, dairy and sweeteners provide smaller shares of our daily caloric intake than they did four decades ago; then again, so do fruits and vegetables (7.9% in 2010 versus 9.2% in 1970).