Everyone needs calories to survive.A calorie is the measurement of potential energy something can give you. Everyone has a different recommended caloric intake, varying by how good your metabolism is, how active you are, and what age you are. Usually adolescents between the ages of 12 and 18 have many growth spurts and may have to intake more calories than ages outside of that zone.
Your body needs nutrients to help promote the growing process.In eating nutrients you must also intake calories.
Carbohydrates:Carbohydrates are very important for active teens because carbohydrates are the main source of energy for the body. Some fruits, vegetables and whole grains are good healthy examples of carbohydrates. Karen Bergs, a Registered Dietitian with Utah State University, recommends that teenage athletes get 60 to 65 percent of their calories from carbohydrates. For example, if they eat 2,200 calories in a day, they should eat at least 330 grams of carbohydrates.
Protein: Protein is very important for active teens because it helps strengthen muscles. Utah State University recommends that active teens should consume 12 to 15 percent of their calories from protein, but should not overdo the protein because eating too much protein has possible harmful side effects like liver problems. Good healthy examples of protein include fish, poultry, nuts, eggs, soy products and tofu.
Fat:
Most high-fat foods are many times thought of as being unhealthy. Most teens that watch their weight usually try to avoid fat in their meals but fat is actually a very important nutrient. KidsHealth.org states that fats are used for long-lasting energy. Fats they recommend include salmon, avocados, olive oil and nuts. Fats should make up 20 to 30 percent of an active teens diet.
Soda: • Full of sugar, corn syrup, and other sweeteners.
• Most soft drinks are packed 150 empty calories.
• Lots of Caffeine (30-55 mg of caffeine per one can of soda)
• According to some studies, soda has been linked to bone
weakening, obesity, tooth decay and heart disease.
Potato Chips: • If you eat just three ounces a week, in one year you'll have consumed 23,400 calories.
Doughnuts: • Deep fried.
• Filled with sugar.
• Have 19 grams of fat.
• Store-bought doughnuts contain 35-40
percent trans fat.
Salt:
• High intake of salt thickens and stiffens arteries and increases the risks of strokes, and cardiac failure.
• Sodium chloride draws calcium from your bones, which is excreted in your urine. This leads to early and painful osteoporosis, or the thinning and fracturing of your bones. http://www.healthassist.net/conditions/food-avoid.shtml