Adolescents and puberty
The teenage years are a time of rapid growth and development, so a healthy balanced diet is particularly important. Healthy, active young people can have large appetites. It's important for teenagers to eat well-balanced meals, rather than too many snacks high in fat, sugar or salt.
Puberty
As the body is rapidly maturing during the teenage years, requirements for energy and protein increase accordingly. Boys have slightly higher protein requirements than girls, as they tend to be larger with a higher amount of lean body mass.