protein to cope with growth spurts, boys tend to need more protein than girls as muscular tissue develops, examples include omelettes, chicken
iron to help teenage girls who have periods, to reduce risk of anaemia, examples include spinach, beef
vitamin c to help the body absorb iron, examples include peppers, strawberries
calcium to help the skeletons grow quickly, sources include milk, yoghurt, kale and tofu
vitamin d to help reach peak size and bone density, examples include tuna, salmon, mackerel