My 15 years old son feels hungry all the time, and he loves to munch snacks at almost all the time. I understand that it becomes slightly difficult to control wrong eating habits at this age. I want to know about the required food and nutrition for my kid, as he is a picky eater. I have also heard about some food and nutrition chart, and I would like to confirm if it helps in deciding the food, I need to give my child to eat. Can somebody please assist me?