What's on
a good plate.
hungry and curious.
Why a body needs food at all.
Every second of every day, your body is doing work. Your heart is pumping, your lungs are filling, your brain is firing, and — because you are thirteen — you are still growing. None of that is free. It all runs on food. Think of eating not as a set of rules to follow, but as the simplest, oldest thing a living body does: it takes in the world and turns it into more of itself.
There are three big jobs that food does. The first is energy — fuel to move, think, keep warm, and stay alive even while you sleep. The second is growth — the raw material to build new bone, muscle and skin as you get taller. The third is repair and upkeep — fixing a cut, replacing worn-out cells, keeping your immune system stocked so you can fight off a cold. A single meal can be doing all three at once.
That last point matters more than any other in this lesson: no single food does the whole job. An apple is wonderful and gives you almost no protein. A boiled egg is full of protein and has almost no fibre. Bread brings energy but few vitamins on its own. The body doesn't want one perfect food — it wants a mix, spread across the day. That idea has a name in the UK, and a picture to go with it. We'll meet it shortly.
Even lying completely still, your body burns fuel to keep your heart beating, your temperature steady and your brain ticking over. This baseline is called your resting metabolism. The brain alone, though it weighs only about 2% of you, uses roughly a fifth of that resting energy. Thinking is hungry work.
Your body is mostly water — around 60% of an adult's weight, and a little more in children and teenagers. You rebuild a huge amount of yourself constantly: the lining of your gut renews itself every few days, and your skin replaces its outer layer about once a month. All of that rebuilding is paid for in food and water.
The nutrients, and what each one does.
Food is made of nutrients — the useful substances your body draws out as it digests a meal. Three of them give you most of your energy and bulk, so they're called the macronutrients (macro means large). Two more — vitamins and minerals — are needed in tiny amounts but matter every bit as much, so they're the micronutrients (micro means small). And then there are fibre and water, which keep the whole system running. Here is the cast.
| Nutrient | What it mainly does | Found in |
|---|---|---|
| Carbohydrate | The body's main source of energy. Broken down into glucose, which fuels muscles and brain. | Bread, rice, pasta, potatoes, oats, fruit. |
| Protein | Growth and repair — the building material for muscle, bone, skin, hair and the immune system. | Beans, lentils, eggs, fish, chicken, nuts, dairy. |
| Fat | A concentrated store of energy, plus insulation and protection for organs. Some vitamins need it to be absorbed. | Olive oil, oily fish, nuts, seeds, avocado, butter. |
| Vitamins | Tiny helpers for hundreds of jobs — vitamin C for healing, vitamin D for strong bones, and many more. | Fruit, vegetables, eggs, oily fish, dairy. |
| Minerals | Such as iron (carries oxygen in blood) and calcium (builds bones and teeth). | Leafy greens, red meat, dairy, beans, nuts. |
| Fibre | Keeps digestion moving smoothly and helps you feel comfortably full. | Wholegrains, beans, fruit and vegetables with skins on. |
| Water | The fluid everything happens in — carries nutrients, cools you, flushes out waste. | Drinks, and the water inside fruit, vegetables and soups. |
Notice something about that last column: the same foods keep turning up under different jobs. Beans give you protein and fibre and minerals. An egg gives protein, fat and several vitamins. That overlap is the whole reason variety works so well — eat a range of foods and you quietly collect a range of nutrients without ever having to count them.
Tap each card — the headline job of each macronutrient:
Scurvy — the disease that killed more sailors than storms or battles for centuries — is nothing more than a lack of vitamin C. In the 1750s a Scottish naval surgeon, James Lind, ran one of the first proper experiments in medicine and found that citrus fruit cured it. That's why British sailors were later nicknamed "limeys".
The Eatwell Guide — a balanced plate, drawn out.
Rather than ask anyone to remember a table of nutrients, the UK puts the whole idea into one picture: the Eatwell Guide. It's a plate sliced into segments. The size of each slice shows roughly how much of your food, across a day or a week, is worth coming from that group. You don't measure it at every meal — it's a rough shape to aim for over time.
The two big slices
- Fruit & vegetables — about a third of the plate. Aim for a range of colours; fresh, frozen, tinned and dried all count.
- Starchy carbohydrates — about a third. Bread, rice, pasta, potatoes. Wholegrain versions bring extra fibre.
The smaller slices
- Protein foods — beans, pulses, fish, eggs, meat. Beans and lentils are a brilliant everyday choice.
- Dairy & alternatives — milk, cheese, yoghurt, or fortified soya drinks. Good for calcium.
- Oils & spreads — a small slice. Used in small amounts, mostly the unsaturated kind such as olive oil.
The Eatwell Guide is about proportions over time, not a scorecard for one plate. A bowl of pasta isn't a balanced plate on its own — but pasta with vegetables, a sprinkle of cheese and some beans or chicken starts to look like the picture. Across a whole day, the slices even out.
The plate is a fairly new idea. Britain's first version came out in 1994 as the "Balance of Good Health", became the "eatwell plate" in 2007, and was redrawn as the Eatwell Guide in 2016 — when the fruit-and-veg slice grew and a glass of water was added to the side. Nutrition advice keeps being updated as scientists learn more.
Variety, water, and room for the things you love.
Once you know the groups and the plate, the rest is gentle. Three ideas carry most of the weight, and none of them is a rule to worry over.
Variety is the quiet trick. Because every food brings a slightly different bundle of nutrients, the simplest way to cover your bases is to eat a range across the week. People sometimes talk about "eating the rainbow" — choosing fruit and veg of different colours — because the colours often signal different vitamins. A red pepper, a handful of blueberries, some green spinach and an orange carrot between them carry a wide spread of goodness.
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Water is a nutrient too. It slips the mind, because it has no taste and no energy, but every reaction in your body happens in water. The usual guide is around six to eight drinks a day, and more when it's hot or when you've been moving a lot. Water, milk and sugar-free drinks all count, and a surprising amount comes from food — soup, fruit and vegetables are mostly water. A good sign you're topped up is that you rarely feel thirsty.
And the things you love fit too. A slice of cake at a birthday, chocolate after dinner, chips on a Friday — these belong in a happy, balanced way of eating. The Eatwell idea isn't about cutting them out; it's about the overall shape of the week. When most of your plates lean towards the two big slices and the colours, there is plenty of room left for the foods that are purely a pleasure. All foods can fit. Enjoyment is part of being well-fed, not the opposite of it.
Food is also one of the oldest ways people connect. Cooking for someone, sharing a meal, learning a recipe that's been in a family for years — these are part of why food matters, alongside the nutrients. A meal made and eaten with others tends to be more varied, slower, and more enjoyed.
Carrots really can help your eyes — they're rich in a substance the body turns into vitamin A, which the retina needs to see in dim light. But the famous wartime story that RAF pilots ate carrots to see in the dark was partly a clever cover — a way to hide the real reason for their night-time accuracy: a new invention called radar.
Which slice of the plate?
The plate below has four numbered slices from the Eatwell Guide. Pick a food chip, then place it in the slice it mainly belongs to. Two of the chips aren't a single food group at all — read each one before you place it.
Match each food to its slice
Name the nutrient.
Fresh one. Which nutrient group is used mainly for growth and repair — building muscle, bone and skin — and is found in beans, eggs, fish and nuts?
The two biggest slices.
What does protein mainly do?
Why variety helps.
A nutrient with no energy.
How much fruit and veg?
The smallest slice.
Where do treats fit?
Plan a balanced plate you'd actually enjoy.
Now make it real. Plan one meal you'd genuinely like to eat — breakfast, lunch or dinner, your choice — and write a few sentences about it. Name the foods, then say which Eatwell group each one comes from. Try to get the two big slices in (something starchy, and some fruit or veg), plus a protein. Mention a drink. And if there's a little something you love on the side, put it in — it belongs. There's no single right answer here; this is your plate.
Your meal · the foods in it · which Eatwell group each one is · a drink · and anything on the side you love. A few sentences is plenty, Florence. No rush.
On your plate, Florence
strong You've got the two big slices working together — something starchy alongside fruit or veg — and you said which group each food sits in, which is exactly how the Eatwell idea is meant to be used. The drink is in there too. This reads like a plate you'd look forward to.
try this One slice is doing all the work on its own — see if a single food could bring in the group that's quietest here. A spoon of beans, a little cheese, a handful of nuts: one small addition is all it takes to round the plate out.
to add You've left room for something you love, and that's the whole spirit of it — a balanced week has space for the foods that are purely a pleasure. Next time, you might plan a second meal and see how the slices even out across a day.
Films and series about food.
Sit down with Dad for any of these. They're warm, curious looks at where food comes from and the joy of making it.
Build a balanced plate.
Add foods to the plate and watch the balance shift against the Eatwell Guide. Try building a day of your real meals — then see what one swap does to the picture.
Tap a food to begin.
The food tray
The Eatwell guide is the UK's friendly picture of how our meals tend to balance out across a day — not a rule for every single plate. Fruit and vegetables and starchy foods like bread, pasta, rice and potatoes make up the biggest share because they give steady energy and fibre. Protein foods like beans, fish, eggs and meat help us grow and repair. Dairy and its alternatives bring calcium for bones. A little from oils and spreads rounds it off. Every food can fit somewhere — variety and enjoyment are the real aim.
How do our bodies get nutrients from food?.
Pay attention to which foods release energy slowly and which quickly — and what that means for a balanced plate.
The words from today.
- Nutrient
- A useful substance in food that the body draws out as it digests — for energy, growth or health.
- Carbohydrate
- The body's main energy nutrient, broken down into glucose; the big starchy slice of the plate.
- Protein
- The nutrient mainly used for growth and repair — building muscle, bone, skin and the immune system.
- Fibre
- Part of plant foods that keeps digestion moving smoothly and helps you feel comfortably full.
- Eatwell Guide
- The UK's picture of a balanced diet: a plate split into five groups in rough proportion to aim for.
- Balanced diet
- Eating a variety of foods across the groups, over a day or week, so the body gets the mix it needs.
You know what a good plate looks like.
You learned why a body needs food — energy, growth, repair — and met the nutrients that do the work: carbohydrate, protein, fat, and the small-but-mighty vitamins, minerals, fibre and water. You can picture the Eatwell plate, two big slices and three small ones, and you know the quiet trick is variety, with water alongside and room for the foods you love. Now go and plan something good to eat, Florence. This is cooking, and it starts here.
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Film recommendations are factual reference only — see each title's own copyright owner.