Anonymous wrote:OP, I think kids going through major growth spurts can require up to 2800 calories a day, especially if they do sports!
Not "up to 2800". I'm a mostly sedentary, average weight middle aged man, and that's about what I eat.
From
http://healthyeating.sfgate.com/many-calories-teenage-boy-need-1871.html
USDA guidelines:
Moderately active teen boys (meaning they walk around a bit rather than sitting on the couch all day): 2400-2800
Active teen boys: 2800-3200
Athletic teen boys: up to 5000. If you're practicing soccer a few hours a day and trying to grow, you'll need a lot of fuel.
Basically, they need to eat until they are not hungry as long as their body fat isn't increasing substantially.