Chapter 7 — Nutrition and Diet

Food and Nutrition: Food gives energy and materials needed for growth, movement and repair. Nutrition is the process by which our body takes in food and uses it for work and health. Nutrition includes eating, digesting, absorbing and using nutrients. Understanding nutrition helps us choose good food for strength, learning and protection from disease.

Children should know simple facts: food is not only taste — it is fuel for our body. Different foods have different materials called nutrients. These nutrients have specific jobs, for example, to give energy, build muscles, protect from infections or help processes in the body. A good diet means getting the right kinds and amounts of these nutrients every day.

Nutrition also connects to daily life. The food we get at home or at school depends on culture, cost and season. Learning about nutrition helps families make better choices with the available foods. It includes the idea of variety: no single food provides everything, so we need many foods. Nutrition connects to hygiene, physical activity and rest — all parts of a healthy life.

In this chapter we study different nutrients, their functions, sources and how to make balanced meals. We learn how digestion works and why clean food and water are important. We also learn about common problems when people do not get the right nutrients and how to fix them using normal home foods and simple habits.

Main Nutrients: Food is made of several important nutrients: carbohydrates, proteins, fats, vitamins, minerals, water and fibre. Each nutrient type performs a different job in the body. Some give energy, some build and repair body parts, and others protect us from illness or help body processes. Teachers should explain how everyday foods fit into these categories and why variety is important.

Carbohydrates and fats are mainly energy sources. Carbohydrates supply quick energy for play and study while fats provide concentrated energy for long-term needs and help the body absorb fat-soluble vitamins. Proteins are primarily for building and repairing body tissues like muscles, skin and blood. Vitamins and minerals act in small amounts as helpers and regulators for digestion, growth, healing and immunity. Water carries nutrients, helps digestion, controls temperature and removes wastes. Fibre helps the digestive system work smoothly and prevents constipation.

A practical way to remember nutrients is to group foods by their main contribution: energy-giving foods (rice, chapati, potatoes), body-building foods (dal, eggs, milk) and protective foods (fruits and vegetables). Stress that many foods are mixed: milk provides protein and calcium; nuts provide fats and some proteins. This overlap means a varied plate gives balanced nutrition. It is also important to teach that daily needs change with age, activity and health: an active child or one recovering from illness needs more energy and protein.

Discuss how cultural food patterns can be balanced using local options — for example, combining cereals and pulses to get complete proteins. Encourage practical classroom tasks like sorting common foods into nutrient groups, planning a week of meals using local seasonal items, and checking how water and fibre support digestion. Emphasise moderation: both deficiency and excess of nutrients can cause health problems.

What are Carbohydrates? Carbohydrates are nutrients that give energy to the body. They are found in cereals like rice and wheat, in starchy foods such as potatoes and maize, and in sugary foods like jaggery and fruits. When we eat carbohydrates, the body breaks them into simple sugars which provide fuel for muscles and the brain. This is why students feel more active and able to concentrate after eating a carbohydrate-containing meal.

There are two main kinds of carbohydrates: simple and complex. Simple carbohydrates, such as sugar and honey, give quick energy but this fades fast. Complex carbohydrates, such as whole grains, millets and pulses, take longer to digest and provide slow, steady energy. They keep you full for longer and help maintain energy during study or play. Whole grains also supply fibre and some minerals.

Explain digestion of carbohydrates in simple terms: enzymes in the mouth and small intestine break starch into sugars. Encourage children to eat more complex carbohydrate foods and reduce sweets and sugary drinks. For example, prefer whole-grain roti, millets, and boiled potatoes instead of candy or sweetened snacks. Also point out that carbohydrates should be eaten with some protein and vegetables to make a balanced meal and improve digestion.

Excessive carbohydrate intake, especially from sweets, can cause tooth decay and unwanted weight gain. Teach students to choose portion sizes based on activity level — a child who plays outdoors needs more energy than a child who is less active. Practical classroom activities can include comparing the energy from an apple and from a small sweet, or timing how long a bowl of porridge keeps one full compared with a sweet snack. These exercises help children understand why complex carbohydrates are better for sustained energy.

Role of Proteins: Proteins are crucial for growth and repair. They help build muscles, bones, skin and blood. During childhood — a time of rapid growth — protein is especially important. Foods rich in protein include pulses (dal, chana), beans, peas, milk, paneer, eggs, fish and meat. These foods supply amino acids, the small building blocks that form proteins in our body.

Some amino acids are called essential because the body cannot make them and they must come from food. Animal foods usually contain all essential amino acids, while plant foods may lack one or two. However, combining different plant foods, for example rice with dal or chapati with soybean, gives all needed amino acids. This idea of complementary proteins is important for children who follow vegetarian diets.

Protein does more than build body parts: it makes enzymes and antibodies which fight infections, and it helps heal wounds. When a child is ill, the body needs more protein for recovery. But eating too much protein does not make a child stronger beyond a point; the body uses what it needs and the rest is removed. Balanced intake is therefore important.

Practical lessons: include at least one protein source in each meal — a glass of milk, a small bowl of dal, or an egg a few times a week. Teach portion sizes appropriate to age and activity. Simple classroom activities can show how mixing cereals and pulses gives better protein quality. Also stress hygiene and proper cooking to make pulses and animal foods safe and easy to digest. This approach helps children and families plan meals that support healthy growth without unnecessary extras.

What do Fats do? Fats are a concentrated source of energy and are important for a growing child. Besides providing energy, fats protect internal organs, keep the body warm, and help in the absorption of fat-soluble vitamins A, D, E and K. Common sources of fats are cooking oils, ghee, butter, nuts, seeds and some fish. It is important to teach the difference between healthy and unhealthy fats so children learn to make sensible choices.

Fats are of different types. Unsaturated fats, found in vegetable oils, nuts and seeds, are generally healthier. Saturated fats, present in ghee, butter and some animal products, should be eaten in moderation. Trans fats, often found in deep-fried and packaged snacks, are harmful and should be avoided. Explain that even good fats should be consumed in small amounts because they are energy-dense and excess leads to weight gain.

Fats also help in brain development of young children and provide a feeling of satisfaction after meals. For infants, breastmilk and appropriate amounts of healthy fats are important. For school-aged children, small portions of nuts, a teaspoon of oil in cooking, and avoiding excessive fried snacks are practical choices. Teach children to prefer cooking methods like steaming, boiling and light sautéing rather than deep frying.

Link fats to overall diet: a balanced meal has a small portion of healthy fats along with carbohydrates and proteins. Demonstrations such as showing how a small spoon of oil contains more energy than a large portion of vegetables can help children understand why moderation matters. Also discuss food labels in simple terms and encourage families to choose less fried and less packaged foods to keep fat intake healthier.

Importance of Vitamins: Vitamins are organic compounds needed in small amounts but they play large roles in keeping the body healthy. They act as helpers in many chemical reactions that keep the body functioning. Different vitamins perform different jobs: vitamin A helps vision and skin health, the B complex vitamins help release energy from food and support nerves, vitamin C helps heal wounds and fight infections, and vitamin D helps the body use calcium to build strong bones and teeth.

Vitamins are found in many foods: fruits, vegetables, milk, eggs and some fish. Colourful fruits and vegetables are rich in vitamins; for example, carrots and sweet potatoes are good sources of vitamin A, citrus fruits and guava give vitamin C, and milk is a source of vitamin D and B vitamins. Because many vitamins are lost in water during cooking, teach gentle cooking methods like steaming or light sautéing to preserve vitamins. Also explain that fat-soluble vitamins (A, D, E, K) need some fat to be absorbed, so a little oil with vegetables helps.

Vitamins cannot be replaced by energy foods; they do not give calories but are essential to make systems work. Deficiency of vitamins leads to specific problems: lack of vitamin A can cause night blindness, lack of vitamin C can cause bleeding gums and slow healing, and lack of vitamin D can lead to weak bones and rickets in children. Most children can get enough vitamins from a varied diet; supplements are needed only when advised by a health worker.

Practical classroom activities include sorting foods by vitamin type, showing pictures of vitamin-rich local foods, and simple experiments like comparing the colour and texture of vegetables cooked in different ways to see vitamin retention. Emphasise eating a variety of foods every day and combining vegetables and fruits of different colours to cover vitamin needs. Make clear the link between vitamins and overall good health, growth and the ability to fight infections.

What are Minerals? Minerals are inorganic substances our body needs in small amounts for many important jobs. Key minerals include calcium, iron, iodine, phosphorus and zinc. They help build bones and teeth, make healthy blood, support growth and ensure organs work correctly. For children, getting enough minerals is essential for proper growth, learning and resistance to disease.

Calcium is vital for strong bones and teeth and is found in milk, curd and small fish. Iron is needed for healthy blood that carries oxygen; good sources include green leafy vegetables, pulses, jaggery and some meats. Iodine helps the thyroid gland work normally and is usually provided by iodised salt. Zinc supports growth and healing and is present in legumes, nuts and whole grains. Phosphorus works with calcium in bone formation and is found in dairy and pulses.

Minerals often work together with vitamins: for example, vitamin D helps the body absorb calcium from food while vitamin C improves iron absorption from plant sources. Simple food combinations — like eating spinach with a squeeze of lemon — increase iron uptake. Using iodised salt in cooking prevents iodine deficiency disorders. Explain to children that both too little and too much of certain minerals can cause problems; balance and variety in food help maintain the right levels.

Prevention of mineral deficiencies involves including inexpensive local foods: milk or curd for calcium, pulses and green vegetables for iron and zinc, and iodised salt for iodine. School programmes such as midday meals and deworming also help improve mineral status in children. Encourage students to list mineral-rich foods available at home and suggest small changes like adding a glass of milk or a serving of leafy greens to daily meals to strengthen their bones and blood.

Water — The Essential Liquid: Water makes up a large part of our body and is essential for life. It transports nutrients and oxygen to cells, removes waste through urine and sweat, helps digestion by dissolving food particles, and keeps body temperature steady. Children lose water quickly when they play, sweat or are ill, so it is important to drink frequently. Plain safe water is the best choice; diluted home drinks like buttermilk or coconut water can also help in hot weather.

Dietary Fibre — The Cleanser of the Gut: Dietary fibre, or roughage, is the part of plant foods that the body cannot digest. Fibre adds bulk to the stool, helps food move through the gut, prevents constipation and keeps the intestine healthy. Foods rich in fibre include whole grains, millets, brown rice, pulses with skin, vegetables and fruits eaten with skin when safe. Fibre also helps maintain a feeling of fullness, which can prevent overeating of less healthy snacks.

Water and fibre work together: fibre absorbs water and swells, softening the stool and easing bowel movements. Drinking adequate water when increasing fibre is important to avoid discomfort. For children, simple steps like choosing whole-grain chapati, eating fruits like guava and orange, and including vegetables daily increase fibre intake. Teach that refined foods like white bread and pastries have less fibre and should be eaten less often.

Stress safe water practices: boil or filter water if its safety is uncertain, and always wash hands before handling food. Explain that infections from unsafe water cause diarrhoea, which leads to loss of both water and nutrients and may cause weakness. Combining good hydration with a fibre-rich diet supports digestion, helps growth and keeps children active and comfortable. Classroom activities include tracking daily water intake and adding one extra fruit or vegetable to meals each day to increase fibre gradually.

What is a Balanced Diet? A balanced diet gives the right amounts of all needed nutrients — carbohydrates, proteins, fats, vitamins, minerals, water and fibre — so a child can grow, learn and play. For a child, portion sizes and food choices depend on age, activity and health. A balanced meal includes a source of energy (cereals or tubers), a source of protein (dal, milk, egg), vegetables and fruits for vitamins and minerals, a small amount of healthy fat and enough water.

Daily variety is important. Different foods provide different nutrients, so eating a range of foods across the week helps prevent deficiencies. For example, mix different pulses, seasonal vegetables and fruits across meals. For vegetarian children, combining cereals and pulses (like rice and dal) provides good quality protein. For non-vegetarian children, occasional eggs or fish add beneficial nutrients. Stress that balance does not mean every food at once but the right mix over the day.

Meals should be regular — do not skip breakfast — because a good breakfast improves concentration and energy. Snacks should be healthy: fruits, roasted chana, nuts or homemade snacks are better than sugary or deep-fried foods. For children recovering from illness, add more frequent, small nutritious meals rich in energy and protein to support recovery. Also, keep portion sizes reasonable: an active child needs more than a less-active child.

Practical classwork includes planning a day’s menu for a child with moderate activity and checking whether it has the major nutrient groups. Use local foods and seasonal items to make balanced meals affordable and acceptable. Encourage family discussion about food choices and small, sustainable changes like adding a vegetable to every meal, using iodised salt, and drinking safe water. Combining good food, rest and physical activity creates a healthy routine for growth and learning.

How Food is Digested: Digestion is the process by which the body breaks food into smaller parts that can be absorbed and used. It starts in the mouth where chewing and saliva break down food. Food then moves to the stomach where acids and enzymes act on it. Most absorption takes place in the small intestine where digested nutrients pass into the blood. Leftover materials go to the large intestine and are removed as waste.

Explain key organs: mouth (chewing and saliva), oesophagus (food pipe), stomach (mixing with juices), small intestine (digestion and absorption), large intestine (water absorption) and rectum (storage of waste before passing out). Simple examples make this clear: bread chewed becomes soft ball, stomach churns food into liquid, intestines absorb useful parts like sugars, amino acids and vitamins.

Introduce the idea of enzymes as helpers that speed up digestion: amylase in saliva acts on starch, proteases act on proteins, lipase acts on fats. Teachers should keep explanations age-appropriate: focus on roles rather than chemistry. Use models or drawings to show the path of food and where nutrients move into the blood. Reinforce hygiene: clean food and teeth keep the digestive system healthy.

Relate digestion to health: poor digestion can cause stomach ache or constipation; eating fibre and drinking water helps. Encourage balanced meals and chewing food well to aid digestion.

Food Sources: Foods come from plants and animals. Cereals, pulses, vegetables, fruits, oils and spices come from plants. Milk, eggs, fish, chicken and meat come from animals. Eating a mix of plant and animal foods gives more complete nutrition but many people get good nutrition from plant-based diets too if planned well. Understanding where food comes from helps children appreciate variety and seasonal choices.

Seasonal variety is important because different fruits and vegetables grow at particular times of the year. Seasonal foods are usually fresher, tastier, cheaper and more nutritious. For example, mangoes and watermelon are available in summer and provide hydration and vitamins; oranges and carrots appear in winter and provide vitamin C and vitamin A. Green leafy vegetables may be more abundant during the rainy season. Teach children to eat what is available locally and seasonally to get a range of nutrients over the year.

Cultural and economic factors influence food choices. Families can combine inexpensive local staples to make nutritious meals, such as millet roti with lentils and seasonal greens. Encourage use of traditional foods and cooking methods that preserve nutrients. Explain simple preservation like drying vegetables, making pickles, or storing pulses to extend seasonal supplies while keeping nutrition. Schools can use local ingredients in midday meals to support child nutrition and local farmers.

Activities include asking students to list foods they eat at home and identify which are plant- or animal-based, and which are seasonal. Create a classroom chart of seasonal foods for each season and discuss one change a family could make to improve nutrition using available foods. This practical approach helps students and families plan affordable, nutritious meals throughout the year.

Deficiency Diseases: When the body does not get enough of a nutrient, specific health problems develop. For example, lack of vitamin A can cause night blindness, lack of vitamin C causes scurvy (bleeding gums, slow healing), lack of iron causes anaemia (tiredness, pale skin) and lack of iodine affects growth and brain development. Protein-energy malnutrition occurs when calorie and protein intake are very low, causing thinness, weak muscles and delayed growth in children.

Recognising signs early helps correct problems. Common signs include tiredness, poor appetite, frequent illnesses, slow growth, pale skin, swollen belly in severe cases, or changes in skin and eyesight. Simple home remedies include adding iron-rich foods (green leaves, jaggery), vitamin A sources (carrot, sweet potato), vitamin C fruits (orange, amla) and protein (milk, dal). For iodine, regular use of iodised salt is effective. Explain that severe or persistent problems need help from health workers and possibly medical treatment.

Social factors like poverty, repeated infections, poor feeding practices, and lack of clean water make deficiency diseases more common. School programmes such as midday meals, nutrition education, deworming and growth monitoring reduce risks. Teach children compassionate attitudes about malnutrition and encourage peer support such as reminding each other to eat fruit or drink water during playtime.

Class activities can include matching deficiency signs to foods that correct them, planning low-cost meals to address a deficiency, and discussing family practices that help prevent malnutrition. Emphasise prevention through regular, varied meals, hygiene, vaccinations and seeking timely medical advice when needed. This empowers children to recognise problems early and take simple, practical steps at home.

Why Food Hygiene Matters: Clean handling and cooking of food prevents infections that cause diarrhoea, vomiting and other illnesses. These illnesses reduce appetite and make the body lose nutrients, worsening nutrition. Simple hygiene steps stop many problems and are easy to practice at home and school. Teach children that keeping food and utensils clean, washing hands and using safe water protect health.

Key practices include washing hands with soap and water before eating and after using the toilet, washing fruits and vegetables before cooking or eating, and keeping cooking areas and utensils clean. Teach safe cooking: cook food thoroughly to kill germs, avoid cross-contamination of raw and cooked food, cool and store leftovers quickly and reheat them well before eating. Explain that flies and insects spread germs, so cover food and keep it away from flies and dust.

Safe drinking water is essential. Boil or filter water when its quality is uncertain and store it in clean covered containers. Avoid drinking from unknown sources and teach children to carry their own water bottles and not share them without washing. Also discuss food choices outside the home: choose clean-looking stalls, avoid food left in the open for long times, and prefer freshly cooked snacks.

Practical classroom activities include demonstrating proper handwashing steps, checking a lunchbox for cleanliness, and making a poster of hygiene rules. Link hygiene to digestion and nutrition: when children avoid infections they absorb nutrients better and stay energetic. Emphasise that hygiene is a shared responsibility at home, school and community to keep everyone healthy and able to learn.

Planning Meals: Planning helps ensure balanced intake of nutrients. For a child, think of three regular meals and healthy snacks in between if hungry. Each meal should include a source of carbohydrate, some protein, vegetables or fruit and a small amount of fat. Use local affordable foods — pulses, seasonal vegetables and milk — and include variety across the week so the child gets different nutrients each day.

Healthy snacks support growth and energy between meals. Replace sugary and fried items with fruits, roasted chana, peanuts, popcorn (light, unsalted), boiled corn, or homemade vegetable sandwiches. These choices supply vitamins, minerals, fibre and sometimes protein. Teach children simple snack-making ideas they can do at home: fruit chaat, vegetable sticks with curd dip, or a small bowl of mixed nuts. Encourage carrying a water bottle to stay hydrated and choosing fruits over sweet packaged goods.

Discuss portion sizes and timing: snacks should be small and healthy, not replacing meals. For active children who play in the morning, a carbohydrate-rich breakfast and a mid-morning snack help maintain energy. For less active children, reduce portions. Encourage parents to prepare snacks at home where hygiene is better and quality can be controlled. Explain label reading in simple terms — look for expiry date and avoid damaged packages.

Class activities include creating a one-day menu for a child with sample snacks and checking for balance and hygiene. Students can suggest improvements to common snack choices at home and make a healthy snack plan for a week. Emphasise small realistic changes: reduce oil and sugar, increase fruits and nuts occasionally, and always wash hands before eating. These habits build lifelong healthy choices for children and families.