Observations: the food does not repeat exactly every day — cereals (rice, wheat) appear daily, but the accompanying dal, vegetable or curry keeps changing. Comparing lists with friends usually shows some common items (rice, chapati, dal) but also differences based on regional and family preferences (e.g. some friends may eat idli-dosa often, others may eat parathas).

Common food items across states: rice, dal/pulses, and tea/buttermilk-type beverages appear in most states.

Relation between traditional food and local crops: the traditional food of a state is almost always built around whatever crop grows well there — e.g. Punjab (wheat belt) eats wheat-based roti/parantha, Karnataka and Kerala (rice/coconut belt) eat rice- and coconut-based dishes, Manipur (bamboo/rice region) uses bamboo shoots and rice.

Why the diversity? India’s soil types and climate vary widely region to region, so different crops are cultivated in each region; food choices are also shaped by taste preferences, culture and tradition.

Sample interview findings (from a grandparent): “We still eat the same dals and seasonal vegetables, but earlier we cooked on a chulha using wood, which took much longer and needed constant attention. We ground spices and batter by hand using a sil-batta, which was hard work. Today’s gas stove and electric grinder save a lot of time and effort.”

What has caused these changes? Technological development (gas stoves, electric appliances), improved transportation (ingredients from other regions now easily available) and better communication (recipes and information spreading faster) have all driven this shift from traditional to modern culinary practices.

Sample survey finding: a neighbour frequently complains of tiredness and shortness of breath. Correlating this with the chart suggests a possible iron deficiency (anaemia), especially if their diet lacks green leafy vegetables, beetroot or pomegranate.

Suggested change: include more iron-rich foods like spinach, beetroot and pomegranate in the diet — and, most importantly, advise them to visit a doctor for proper diagnosis and confirmation before self-treating.

A blue-black colour after adding iodine confirms the presence of starch. Items like potato, boiled rice, boiled gram, and bread/chapati typically turn blue-black (starch present), while items like cucumber, oil, butter, and crushed coconut do not change colour (little to no starch).

If the food item contains fat, it leaves a translucent oily patch on the paper — light shines faintly through this patch. Items such as peanuts, butter, and crushed coconut leave a clear oily patch (fat present), while items like boiled rice or cucumber generally leave little or no patch.

A violet colour appearing in the test tube indicates the presence of protein. Peanuts and soya bean/gram typically turn violet (protein present); plain rice or oil generally do not.

Checking my Table 3.1 list: it has good carbohydrates (rice, chapati) and some protein (dal, paneer, fish) — but it is a little short on fresh fruit and green leafy vegetables (vitamins, minerals and roughage) through the week.

Changes to make it balanced: add a fruit serving daily, include a green vegetable in at least one meal every day, include nuts/seeds a few times a week, and drink enough water throughout the day.

I would choose roasted chana. It has far less fat, nearly three times more protein, and over three times more dietary fibre than potato wafers, while also providing fewer empty calories. Potato wafers are high in fat and calories but comparatively low in protein and fibre — making them a typical junk food.

(i) Odd one out: Chana. Jowar, bajra and ragi are all millets/cereals — mainly carbohydrate-rich energy foods. Chana (chickpea) is a pulse/legume — a protein-rich, body-building food.

(ii) Odd one out: Rice. Kidney beans, green gram and soya bean are all pulses/legumes — protein-rich sources. Rice is a cereal — mainly a carbohydrate (energy-giving) source.

These changes came about due to technological development, improved transportation, and better communication — though many families today still combine both, keeping some traditional methods (like using a sil-batta for chutney) alongside modern convenience appliances.

• “Can eating the right foods actually cure a disease that has already started, or does it only prevent one from starting?”
• “If good food is like medicine, which foods should I eat to protect myself from common problems like colds or weak eyesight?”
• “Is there a specific amount or timing in which these foods work best, like actual medicine doses?”

This is true. Delicious but not very healthy: potato wafers, candy, fried snacks, ice cream — tasty, but high in sugar/fat and low in other nutrients if eaten often.

Healthy but not always enjoyable: bitter gourd (karela), plain boiled vegetables, methi (fenugreek) leaves — packed with vitamins/minerals but not everyone’s favourite taste.

This is exactly why a balanced diet matters — we should not choose foods only for taste, and not avoid healthy foods only because they aren’t our favourite; a mindful balance of both is ideal.

Medu’s diet is very low in roughage (dietary fibre), since biscuits, noodles and white bread are refined, low-fibre foods, while he is avoiding vegetables — the main source of roughage. Roughage is what helps the smooth passage of stools; without enough of it, undigested waste moves slowly, causing constipation and stomach ache.

Changes to make: add green leafy vegetables, fresh fruits, wholegrains and pulses to his meals, reduce refined/processed foods, and drink enough water daily (water also helps roughage do its job).

(i) She is suffering from night blindness — an early symptom of loss of vision caused by Vitamin A deficiency.

(ii) Vitamin A is lacking in her diet.

(iii) She should include: papaya, carrot, mango, and milk (all good sources of Vitamin A).

I would prefer fresh fruit (iii). Whole fresh fruit retains its full dietary fibre (roughage) along with its vitamins, whereas juicing removes most of the fibre, and canned juice often loses vitamins during processing and may contain added sugar and preservatives. Eating the whole fruit gives the most complete and unprocessed nutrition.

(i) Calcium keeps bones (and teeth) healthy and strong — it is needed to help heal and rebuild the fractured bone.

(ii) Vitamin D helps the body absorb calcium. Without enough Vitamin D, the calcium tablets alone may not be used effectively by the body, so the doctor added it to make the calcium work better.

(iii) A natural question: “Since Vitamin D helps absorb calcium, why weren’t both given together from the very first visit?” — this shows how understanding what each nutrient does helps us understand medical decisions better.

The iodine test detects specifically the presence of starch, not all carbohydrates. Sugar is a simple carbohydrate (like glucose or sucrose), which has a different chemical structure from starch, so it does not react with iodine to give the blue-black colour — even though it is still a carbohydrate.

Yes, this statement is correct. Starch is just one specific type of carbohydrate; sugar and glucose are other types of carbohydrates that are not starches.

This happens because of what the fabrics are made of. Cotton sarees are often made from starched cotton fibres (cotton fabric is commonly treated/stiffened with starch during finishing), so the iodine reacted with this starch and turned the saree blue-black. The socks were likely made of a synthetic material (like nylon or polyester) that contains no starch, so there was no colour change.

Millets (jowar, bajra, ragi, sanwa) are considered healthy because they are rich in vitamins, minerals (like iron and calcium), and dietary fibre — this is why they’re also called nutri-cereals. They can also be grown in a wide range of climatic conditions, making them a sustainable crop choice.

However, eating just millets is not enough. Our body also needs adequate proteins (from pulses, milk, eggs etc.), fats, other vitamins (like Vitamin C), and enough water — millets alone cannot supply every nutrient our body needs. A truly balanced diet requires a variety of food groups, with millets forming a healthy part of that variety rather than the whole diet.

Take a small piece of a known starchy food, such as a slice of potato or a bit of boiled rice, and add a few drops of the unknown solution to it. If the solution is iodine, the starchy food will turn blue-black. If there is no colour change, the solution is likely not iodine.