Why this chapter matters for UPSC: Nutrition and food security intersect GS3 (agriculture, food processing, government schemes) and GS2 (health, welfare, social justice). Prelims tests specific deficiency diseases, vitamin sources, and government nutrition programmes. Mains demands analysis of India's dual burden of malnutrition — undernutrition AND rising obesity/NCDs. POSHAN Abhiyaan, NFSA 2013, PM POSHAN, Anaemia Mukt Bharat, and FSSAI are core syllabus items.

PART 1 — Quick Reference Tables

Table 1: Macronutrients — Types, Sources, Energy

Nutrient	Energy	Key Functions	Indian Food Sources
Carbohydrates	4 kcal/g	Primary energy; brain runs on glucose	Rice, wheat, millets, potato, sugar
Proteins	4 kcal/g	Build/repair tissues; enzymes, hormones, antibodies	Pulses (dal), milk, eggs, meat, soya
Fats	9 kcal/g	Concentrated energy; cell membranes; fat-soluble vitamins (A,D,E,K)	Ghee, oils, nuts, seeds, fish
Water	0 kcal	Transport, temperature regulation, digestion, ~60% of body weight	All foods + direct intake
Dietary Fibre	0 kcal	Gut health; prevents constipation, diabetes, heart disease	Whole grains, legumes, vegetables, fruits

Table 2: Vitamin Deficiency Diseases (High-Frequency Prelims Topic)

Vitamin	Deficiency Disease	Key Symptom	India Relevance
A (Retinol)	Night blindness; Xerophthalmia	Cannot see in dim light; dry eyes	~330,000 child cases/year; Nat. Vit A Supp. Programme
B1 (Thiamine)	Beriberi	Nerve damage, heart failure	Polished rice staple diets
B3 (Niacin)	Pellagra	Dermatitis, diarrhoea, dementia (3Ds)	Maize-dominant diets
B9 (Folate/Folic Acid)	Neural tube defects	Spina bifida in newborn	Maternal nutrition priority
B12 (Cobalamin)	Megaloblastic anaemia; nerve damage	Fatigue, neurological issues	Vegetarian/vegan diets at risk
C (Ascorbic Acid)	Scurvy	Gum bleeding, joint pain, slow wound healing	British sailors used limes → "limeys"
D (Cholecalciferol)	Rickets (children); Osteomalacia/Osteoporosis (adults)	Bowed legs; weak bones	Paradox: India has high solar UV but 70%+ deficiency
K (Phylloquinone)	Bleeding disorder (coagulopathy)	Uncontrolled bleeding	Neonatal Vit K injection is standard practice

Table 3: India's Key Nutrition Programmes

Programme	Full Name	Ministry	Key Feature
POSHAN Abhiyaan	PM's Overarching Scheme for Holistic Nourishment	WCD	Launched 2018; targets stunting, wasting, underweight, anaemia
PM POSHAN	(formerly MDM)	Education	Mid-Day Meal for school children; 11.8 crore beneficiaries
ICDS	Integrated Child Development Services	WCD	14 lakh Anganwadis; children 0–6 + pregnant/lactating women
NFSA 2013	National Food Security Act	Consumer Affairs	67% population; 5 kg grain/person/month at ₹1–3
Anaemia Mukt Bharat	—	Health	IFA tablets + deworming; targets 6 beneficiary groups
PM Poshan Shakti Nirman	Fortification	Food	Rice, wheat flour, oil fortification

PART 2 — Detailed Notes

1. Nutrients and Their Functions

Key Term

A nutrient is a substance that an organism needs from its environment to survive, grow, and reproduce. Nutrients are divided into:

Macronutrients — needed in large amounts: carbohydrates, proteins, fats, water
Micronutrients — needed in small (micro/milli gram) amounts: vitamins and minerals
Dietary fibre — not digested but essential for gut health

Caloric density matters for policy: Fats provide 9 kcal/g (vs 4 kcal/g for carbs/proteins) — explains why ultra-processed foods (high fat + sugar) drive obesity; why edible oil prices are politically sensitive in India.

Carbohydrates:

Simple (sugars — glucose, fructose, sucrose) vs. complex (starch, cellulose)
Cellulose is dietary fibre — humans cannot digest it (no cellulase enzyme) but gut bacteria can; essential for bowel regularity
Millets (Bajra, Jowar, Ragi) are complex carb staples rich in fibre — government's promotion of millets as part of "Shree Anna" (International Year of Millets 2023) has nutritional + agricultural rationale

Proteins:

Made of 20 amino acids; 9 are "essential" (must come from diet; body cannot synthesise)
Complete proteins (all 9 essential AAs): eggs, meat, milk, soya
Pulse + cereal combination (dal-chawal, rajma-chawal) provides complete protein — traditional Indian diet wisdom
Protein deficiency: Kwashiorkor (adequate calories, low protein — swollen belly due to fluid imbalance) and Marasmus (total calorie deficiency — wasted muscle)

2. Vitamins — Classification and Deficiencies

Explainer

Fat-soluble vitamins: A, D, E, K — stored in liver and fat tissue; excess can be toxic (hypervitaminosis) Water-soluble vitamins: B complex (B1, B2, B3, B5, B6, B7, B9, B12) and C — not stored; need daily intake; excreted in urine if excess

India-specific vitamin deficiency paradox:

Vitamin D: India receives abundant sunshine yet 70–80% of Indians are Vitamin D deficient (studies by AIIMS, ICMR). Reasons: melanin in darker skin reduces UV absorption; indoor lifestyles; pollution (absorbs UV); vegetarian diet (Vit D mainly in fish, egg yolk). Policy response: food fortification (milk, oil)
Vitamin A: National Vitamin A Supplementation Programme gives high-dose supplements to children 9 months to 5 years every 6 months

3. Mineral Deficiencies in India

UPSC Connect

UPSC GS3 — Food Security and Nutrition: Iron-deficiency anaemia is India's most prevalent nutritional deficiency:

NFHS-5 (2019-21): 57% of women aged 15–49 anaemic; 67% of children under 5 anaemic
Causes: low iron in diet (rice-dominant diets), low bioavailability, parasitic infections (hookworm), tea/coffee reducing iron absorption
Policy response: Anaemia Mukt Bharat — targets 6 beneficiary groups (children 6–59 months, 5–9 years, 10–19 years, pregnant women, lactating mothers, women 15–49)
Iron Folic Acid (IFA) supplementation + mandatory fortification of rice distributed under PDS

Iodine deficiency:

Causes goitre (enlarged thyroid), cretinism (severe intellectual disability in children) if deficient during pregnancy
India made iodisation of salt mandatory under the Prevention of Food Adulteration Act; later under FSSAI regulations
~71 million Indians estimated at risk from iodine deficiency (WHO)

Zinc deficiency: affects ~17% of Indians; causes stunting, impaired immunity, delayed wound healing; significant in children under 5 — WHO includes zinc in diarrhoea treatment protocol (ORS + zinc)

4. India's Nutrition Programmes — Detailed

POSHAN Abhiyaan (2018):

PM's flagship nutrition programme targeting pregnant women, lactating mothers, children under 6
Targets to reduce stunting/wasting by 2%/year, underweight by 2%/year, anaemia by 3%/year
Uses ICDS infrastructure (Anganwadis) + technology (Poshan Tracker app for real-time monitoring)
Integrates 9 ministries under a convergence framework; now subsumed under Mission POSHAN 2.0 (budget: ₹20,263 crore in FY 2024-25)

ICDS (Integrated Child Development Services):

World's largest early childhood development programme
~14 lakh Anganwadi Centres (AWCs) across India
Services: supplementary nutrition, immunisation, health check-up, referral, pre-school education, nutrition and health education
Beneficiaries: ~8 crore children under 6, ~2 crore pregnant/lactating women

PM POSHAN Scheme (formerly Mid-Day Meal):

Reaches ~11.8 crore children in 11.2 lakh schools
Dual benefit: nutrition + school attendance (especially girls); reduces dropout rates
Source of GS2 + GS3 overlap questions

NFSA 2013:

Covers 67% of India's population (75% rural, 50% urban)
Entitlement: 5 kg foodgrain/person/month at ₹1 (coarse grains), ₹2 (wheat), ₹3 (rice)
Antyodaya Anna Yojana (AAY) households: 35 kg/month
PM Garib Kalyan Anna Yojana (PMGKAY): free foodgrain (extended through 2028)

5. Food Safety — FSSAI

UPSC Connect

UPSC GS3 — Food Processing and Regulation: FSSAI (Food Safety and Standards Authority of India):

Established under Food Safety and Standards Act, 2006
Autonomous body under Ministry of Health and Family Welfare
Functions: sets standards for food products; licenses food businesses; enforces Food Safety Acts
"Eat Right India" initiative: promotes safe + healthy + sustainable food choices
Food adulteration is pervasive: FSSAI surveys found adulteration in milk (detergent, urea), honey (sugar syrup), spices (brick dust, Sudan dye), edible oils (mineral oil)
Fortification: FSSAI mandates + logo — Rice, wheat flour (+F logo), Edible oil, Milk — addresses micronutrient deficiency at population scale

GI Tags for Traditional Foods: India has 500+ GI tags; Darjeeling tea (first Indian GI, 2004), Alphonso mango, Tirupati laddoo — protect traditional food products' authenticity.

6. India's Dual Burden of Malnutrition

India faces simultaneous crises:

Undernutrition: 35.5% children stunted (NFHS-5); 19.3% wasted; 32.1% underweight
Overnutrition: 24% adults overweight/obese; rising type-2 diabetes, hypertension, cardiovascular disease
Hidden hunger: micronutrient deficiency without visible starvation — affects productivity, cognitive development
Nutrition transition: shift from traditional millets/pulses to polished rice/wheat + ultra-processed foods — driven by PDS incentives (rice/wheat subsidy) and urbanisation

Exam Strategy

Prelims traps:

Vitamin D deficiency → Rickets (children) / Osteomalacia (adults) — NOT the same disease name
Scurvy = Vitamin C deficiency (NOT Vitamin A)
Night blindness = Vitamin A deficiency (NOT Vitamin D)
NFHS-5 anaemia figures: women 57%, children under 5 = 67%
POSHAN Abhiyaan launched in 2018 (NOT 2014 or 2016)
FSSAI is under Ministry of Health, NOT Agriculture
PM POSHAN is the new name for Mid-Day Meal Scheme — older name still appears in options

Mains angles:

"India's malnutrition paradox — food surplus yet hungry millions. Examine the structural causes and policy gaps."
"Critically evaluate the POSHAN Abhiyaan in addressing India's nutrition challenge."
"The NFSA 2013 has transformed food security but not nutrition security in India. Comment."

Practice Questions

Prelims:

Which vitamin deficiency causes Rickets in children?
(a) Vitamin A
(b) Vitamin C
(c) Vitamin K
(d) Vitamin D
With reference to the POSHAN Abhiyaan, consider the following statements:
1. It was launched in 2018.
2. It is implemented by the Ministry of Women and Child Development.
3. It targets children under 14 years of age.
  Which of the statements given above is/are correct?
  (a) 1 and 2 only
  (b) 2 and 3 only
  (c) 1, 2, and 3
  (d) 1 only

Mains:

India faces a dual burden of malnutrition — undernutrition among children and obesity among adults. Examine the causes of this paradox and suggest a comprehensive policy response. (CSE Mains 2023, GS Paper 3, 15 marks)
Discuss the role of FSSAI in ensuring food safety in India. What are the major challenges in food adulteration and how can they be addressed? (CSE Mains 2022, GS Paper 3, 10 marks)

Ch3: Mindful Eating: A Path to a Healthy Body