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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.
Between the ages of 9 and 13, girls need 2 cups of vegetables a day and boys need 2.5 cups. Girls between 14 and 18 years old need 2.5 cups of vegetables per day, and boys in this age range need 3 cups per day. Note that 2 cups of leafy greens count as a single 1-cup serving. For other vegetables, 1 cup by volume is a single cup serving.