Dr. Anastasia Searcy, DO is a family medicine specialist in Vermillion, SD and has been practicing for 8 years. She graduated from Des Moines Univ Coll Of Osteo Med & Surg in 2007 and specializes in family medicine.
Girls aged 11 to 13 need 1,800 to 2,200 calories per day while those between the ages of 14 and 18 need 1,800 to 2,400 calories per day, according to the Academy of Nutrition and Dietetics. One of the main factors affecting the calorie needs of teenagers is activity level.
Care: 1  Nutrient Needs: The amount of calories and protein that your teenager needs each day depends on his age and weight in kilograms. Divide your teenager's weight in pounds by 2.2 to figure out what he weighs in kilograms (kg). 2  Calories. From 12 to 14: about 45 to 55 calories per kg. 3  Changing Food Habits.