Its true many teens eat a ton of junk food. But junk food alone is not the sole reason teens can be overweight, obese or morbidly obese. Teens have different nutritional requirements than an adult; especially an older adult.
People gain weight for a number of reasons. This weight gain can lead to severe weight problems such as being overweight, obese or morbidly obese. This presentation discusses 12 of the more common reasons people gain weight.