Almost all the food you eat has some of the Big Three in it. But there are other things too which you need to eat in much smaller amounts. They are vitamins and minerals. You need small amounts of both. I’m sure you know about vitamins. There are quite a few and most of them have letters: vitamins A, B, C, D and E.

And minerals? One is salt. Other important ones are calcium and iron.
Anything else? Well yes. Scientists have discovered that all kinds of other things in fresh fruit and vegetables are very useful in helping stay healthy. This is part of the reason why it’s a good idea for people to eat lots of these foods. They contain useful things like flavonoids as well as lots of vitamins. They also have stuff in them that people can’t digest very well called fibre (so do grains like oats) which turn out to be useful too because they help prevent nasty diseases like cancer.