Nutrients
Carbohydrates, proteins, fats, vitamins, minerals.
Nutrients
Nutrients
What you'll learn
- Nutrients — components in food that body needs: carbohydrates, proteins, fats, vitamins, minerals, water, fibre.
- Function of each group — energy, growth, repair, protection from disease.
- Food sources common in Indian diets — roti, dal, milk, fruits, green vegetables.
- NCERT Looking Around 5, Chapter 3 (From Tasting to Digesting).
Key concepts
Level 1 — Major nutrients
Verbal: Different nutrients do different jobs — no single food has everything in ideal amounts.
Symbolic: Balanced plate → mix of nutrient groups.
| Nutrient | Main function | Indian food sources |
|---|---|---|
| Carbohydrates | Energy | Rice, roti, potato |
| Proteins | Growth, repair | Dal, milk, eggs, paneer |
| Fats | Energy reserve, warmth | Oil, ghee, nuts |
| Vitamins | Body regulation, immunity | Fruits, vegetables |
| Minerals | Bones, blood, nerves | Milk (Ca), green leafy (Fe) |
| Water | All life processes | Drinks, fruits, soup |
| Fibre | Healthy digestion | Whole grains, vegetables |
NCERT link: Ch 3 — tasting different foods; digestion journey intro.
Level 2 — Simple tests (conceptual)
Verbal: Starch with iodine turns blue-black; fats leave oily patch on paper (NCERT-style activities).
Real-life: Mid-day meal at school combines rice (carb), dal (protein), vegetables (vitamins/minerals).
| Nutrient | Deficiency risk (preview) |
|---|---|
| Protein | Poor growth |
| Iron | Weakness (anaemia intro) |
| Vitamin A | Night vision issues |
Worked example
Classify: roti, banana, groundnut — main nutrient each provides.
Step 1 — Roti (wheat): mainly carbohydrates.
Step 2 — Banana: carbs + vitamins (B, C) + minerals.
Step 3 — Groundnut: fats + protein.
Answer: Carb-rich roti; banana mixed; groundnut fat/protein.
Why do athletes need more protein?
Step 1 — Protein builds and repairs muscle.
Step 2 — Training damages muscle fibres slightly → repair needs protein.
Answer: Growth and repair of body tissues.
Common mistakes
| Mistake | Why it happens | Fix |
|---|---|---|
| Fats are always bad | Diet fad language | Body needs some fats — excess harmful |
| Vitamins give energy directly | Confusion with carbs | Vitamins regulate — carbs/fats provide energy |
| Only fruits have vitamins | Ignore vegetables | Both plus some animal sources |
| Sugar is a separate nutrient class | Label reading | Sugars are carbohydrates |
Quick check
- Name three nutrient groups and one function each.
- Which nutrient builds muscles?
- Two sources of carbohydrates in Indian meals?
- Stretch: Why is water listed as a nutrient though it has no calories?
Revision tip: Draw today's lunch plate — colour-code nutrients (carb, protein, vitamin) with a key.
Open the Practice tab for graded questions on Nutrients.
Key Takeaways (TL;DR)
- What you'll learn
- Key concepts
- Worked example
- Common mistakes
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