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The U.S. Department of Agriculture recommends children ages 9 and older and adults consume at least 3 cups from the dairy group each day. Active teenagers with high calorie requirements of 3,000 calories or more may require 4 cups from the dairy group each day.
Teens should consume no more than 2,400 milligrams per day, yet many fast-food restaurant items contain more than half that amount. A typical breakfast biscuit with ham can have 1,433 milligrams; a large cheeseburger, 1,589 milligrams; six to eight nachos, 1,800 milligrams.ast-food meals tend to be high in sugar, fat and processed grains and low in fiber, making them 65 to 100 percent more calorically dense than other meals, causing teens to underestimate the number of calories in fast-food meals.