Teens

Start establishing good habits. Many of your attitudes to food are shaped at this age. Try to think of it as fuel and not something you turn to when you are upset, bored or need a reward.

Eat lots of veges, wholegrains and protein, at least 80% of the time, and restrict the foods that aren’t so good for you 20% of the time.

Get an adequate supply of calcium to build strong bones and do weight-bearing exercise, such as walking, running, aerobics or playing sports.

Learn ways of dealing with stress. Many teenagers are prone to anxiety – if you notice symptoms, such as feeling agitated and jittery, practice ways of staying calm, like doing relaxation exercises. Talk to someone if you find it hard to take an interest in anything or feel sad and flat.