Mindful Eating: A Path to a Healthy Body · Lesson 2 of 6
Nutrients for Energy, Growth, and Repair
“Explore how carbohydrates, fats, and proteins support an active, growing body.”
• Explain what nutrients do for the body. • Identify carbohydrate-rich, fat-rich, and protein-rich foods. • Distinguish energy supply from growth and repair. • Recognise both plant and animal sources of fats and proteins. • Explain why a food may provide several nutrients.
What is inside a familiar food?
A chapati, a bowl of dal, and a handful of nuts look different. Each also contains substances that the body uses. Studying these components helps us connect a food with the work it can support in the body, rather than describing it only by taste or appearance.
Food components that supply energy, support growth and repair, protect health, or help the body carry out its functions. The major groups introduced here are carbohydrates, fats, proteins, vitamins, and minerals.
You may feel less energetic when you have not eaten for some time. Walking, playing, breathing, and other activities require energy. A growing body also needs materials to build and repair its parts. Food helps meet these different needs; no single descriptive label tells us everything about it.
Carbohydrates supply energy
Carbohydrates are an important source of energy in our diet. The word names a group of substances, not one particular food. Sugar, glucose, and starch are examples within this group, so they should not be treated as identical substances.
Glucose can provide readily available energy. This explains the familiar example of a runner drinking glucose water during or after a long race. It does not mean glucose water replaces a varied daily diet. Foods such as rice and wheat contain starch, another type of carbohydrate that the body can use for energy.
| Carbohydrate-rich food group | Examples |
|---|---|
| Cereals | Wheat, rice, maize, bajra |
| Starchy vegetables | Potato, sweet potato |
| Fruits | Banana, pineapple, mango |
| Sugars | Glucose and common sugar; sugarcane is a source of sugar |
These examples show that carbohydrate sources can have very different appearances. Rice grains are not sweet like mango, but both provide carbohydrates. A sweet taste is therefore not a reliable test for the whole carbohydrate group. Later, an iodine test will detect starch specifically, rather than every carbohydrate.
Problem
Why might glucose water help a runner feel more energetic, and why is it not a complete meal?
- 1.Running requires energy, and glucose is a carbohydrate that can supply energy readily.
- 2.Growth, repair, and health also depend on other nutrients and essential food components.
- 3.Glucose water alone does not provide the variety needed for a balanced diet.
Fats are another energy source
Fats also provide energy and can serve as stored energy in the body. We obtain them from both plant and animal foods. Visible oil or ghee is easy to recognise, but fat can also be present inside a food such as a nut.
Groundnuts, walnuts, almonds, coconuts, cashew nuts, pistachios, and seeds such as sesame, pumpkin, and sunflower seeds provide fats. Oils are plant sources in many familiar meals. Butter, ghee, and fat-containing dairy foods are animal sources. Foods within a group need not all contain the same amount of fat.
Consider a winter laddoo made with besan or wheat flour, ghee, nuts, seeds, and edible gum. Its flour and sweet ingredients can contribute carbohydrates; ghee and nuts contribute fats. The example connects an energy-rich food with a seasonal tradition. Enjoying such a food still involves choosing a suitable quantity as part of the whole diet.
Problem
A laddoo contains flour, ghee, and groundnuts. Why is it inaccurate to call it a food containing only fat?
- 1.Flour supplies carbohydrates.
- 2.Ghee contributes fat, while groundnuts contain fat and also protein.
- 3.The combined food contains several components, even though we may describe it as rich in fat.
A polar bear’s stored fat is another example of an energy reserve; it also helps insulate its body against cold. Stored fat can help an animal when food is difficult to obtain. Some pregnant polar bears spend long periods in dens without feeding and draw on these reserves. This illustrates energy storage; it does not mean every polar bear sleeps throughout winter.
Fat is not automatically an unwanted component. The body needs suitable amounts of it. The problem with an unbalanced eating pattern is not solved by removing every source of fat or by adding unlimited fat-rich foods.
Proteins help with growth and repair
A growing child needs more than a supply of energy. The body must build new tissue and repair tissue during everyday life. Proteins help with these processes, which is why protein-rich foods are often described as body-building foods.
Plant sources include pulses such as gram, moong, and tuar dal; kidney beans, peas, soya bean, and nuts also contribute protein. Animal sources include milk, paneer, eggs, fish, and meat. A person does not have to use only one type of source: different food traditions can provide protein through different combinations.
Sportspersons use their muscles repeatedly and need an appropriate protein intake to support growth and repair. Growing children also need sufficient protein as part of their overall diet. However, eating protein alone cannot meet the need for carbohydrates, fats, protective nutrients, fibre, and water.
Edible mushrooms can contribute protein and other nutrients. A familiar food example is different from an invitation to collect unknown mushrooms: only recognised edible varieties obtained safely should be used as food.
Problem
A meal includes chapati, dal, curd, and vegetables. Which items are useful protein sources?
- 1.Dal is a pulse-based food and contributes plant protein.
- 2.Curd is a milk product and contributes animal protein.
- 3.The meal therefore contains protein even without meat. Chapati and vegetables also contribute food components, so consider the whole meal rather than a single label.
Foods do not fit into sealed boxes
Calling rice a carbohydrate-rich food is a useful description of a prominent component. It does not say that rice contains only carbohydrates. Similarly, peanuts can contain both fat and protein, and dairy foods can contribute several nutrients.
Use two questions together: Which nutrient is this food a useful source of? What else might the food contain? This approach prevents us from turning a helpful food classification into an incorrect claim. Tests and labels will give us more evidence in later lessons.
Quiz
Which is a carbohydrate?
Which nutrient group is especially associated with growth and repair?
Which pair includes plant sources of fat?
What does “protein-rich food” mean?
Which meal component is a pulse-based protein source?
Practice Problems
- List three carbohydrate sources that are not all sweet foods.
- Explain why glucose water supplies energy but is not a balanced daily diet.
- Sort four fat sources into plant and animal sources.
- Explain how a laddoo can contain both carbohydrates and fats.
- Give three plant and three animal sources of protein.
- A friend says peanuts must be either a fat food or a protein food. Explain the mistake.
Key Takeaways
• Carbohydrates include glucose, sugar, and starch and are important energy sources. • Fats supply energy and can serve as stored energy. • Proteins support growth and repair. • Plants and animals both provide useful nutrient sources. • A food described as rich in one nutrient may contain several others.