Public health uses malnutrition as an umbrella for three families of problem. Undernutrition is a body that has not received or absorbed enough energy, protein or nutrients, and it shows in a child who is short, thin or light for age. Micronutrient deficiency is a shortfall in vitamins and minerals such as iron, vitamin A, zinc, folate, iodine and vitamin B12, and it can exist in a child of normal size. Overweight, obesity and diet-related non-communicable disease sit at the other end of the scale.

Height grows slowly and, after the early years, catches up only partly, so a short child records months or years of inadequate diet, repeated infection and often a poor start in the womb. Stunting is therefore read as a summary of a child's history. The 2008 Lancet series found height-for-age at two years to be the best predictor of adult human capital among the measures studied, using five cohorts from Brazil, Guatemala, India, the Philippines and South Africa (Victora et al., Lancet, 2008).

Weight responds within weeks to illness or hunger, so wasting tracks recent events: a diarrhoeal episode, a lean season, a failed harvest. It is the form most directly tied to death. The 2021 Lancet update reported that in low-income countries 4.7% of children are both stunted and wasted, a condition associated with a 4.8-fold increase in mortality (Victora et al., Lancet, 2021).

Iron, vitamin A, zinc, iodine, folate and vitamin B12 are needed in small amounts, but a shortfall affects immunity, growth, cognition and pregnancy outcomes. Because deficiency is invisible without a blood or urine test, it is called hidden hunger. Anaemia, low haemoglobin, is the most widely measured sign, but it has many causes beyond iron: infections such as malaria and hookworm, other nutrient deficiencies, chronic inflammation and inherited conditions such as thalassaemia and sickle cell disease (CNNS 2016-18 National Report, 2019, Ch. 6).

India's women and men now carry undernutrition and overweight side by side. NFHS-6 (2023-24) found 19.7% of women and 19.7% of men aged 15-49 with a body mass index below 18.5, while 30.7% of women and 27.3% of men were overweight or obese, up from 24.0% and 22.9% in NFHS-5 (NFHS-6 India Fact Sheet, 2026). The overweight share is now higher than the thin share for women.

The 2013 Lancet estimate counts fetal growth restriction, stunting, wasting, vitamin A and zinc deficiency and suboptimal breastfeeding together. Survivors carry the cost too: the 2008 series found undernutrition strongly associated with shorter adult height, less schooling and reduced economic productivity, and for women with lower offspring birthweight, which passes the disadvantage to the next generation (Victora et al., Lancet, 2008).

WHO released new Child Growth Standards on 27 April 2006 (WHO, Child Growth Standards web page). They were built from the WHO Multicentre Growth Reference Study, which pooled about 8,500 children from six countries: Brazil, Ghana, India, Norway, Oman and the United States. The Indian site was Delhi. Children were selected for conditions that do not constrain growth: no maternal smoking, single term births, adherence to feeding recommendations including breastfeeding, and no significant illness (de Onis et al., Food and Nutrition Bulletin, 2004).

A z-score expresses a child's measurement as the number of standard deviations above or below the median of the reference population of the same age and sex. A girl whose height-for-age z-score is -2.5 is two and a half standard deviations shorter than the median healthy girl of her age. In a healthy population about 2.3% of children fall below -2 SD by chance, so prevalence far above that signals a population problem.

Children under two are measured lying down (length) on a measuring board; older children standing (height). The WHO standards build in an average difference of 0.7 cm between length and height, so recording which position was used matters (WHO MGRS Group, Acta Paediatrica, 2006). Weight needs a calibrated scale, ideally one that can tare a mother's weight so the child can be weighed in her arms. Age needs a recorded date of birth, because a few months' error moves a height-for-age z-score substantially.

Large surveys report their exclusions. The CNNS, for example, documents for each anthropometric table how many cases were excluded because a value was flagged and how many because a measurement was missing (CNNS 2016-18 National Report, 2019, Ch. 5). Ask for the same disclosure from any programme survey before trusting its prevalence figure.

A colour-coded tape around the middle of the left upper arm takes seconds, needs no scale or calculator, and predicts mortality well. That is why community workers use it to find acutely malnourished children aged 6-59 months and refer them.

Anthropometry shows outcomes; diet indicators show one of the immediate causes. WHO and UNICEF publish standard infant and young child feeding (IYCF) indicators; the 2021 edition lists 17 recommended indicators, seven of them new (WHO and UNICEF, Indicators for assessing infant and young child feeding practices, 12 April 2021). Three matter most for children 6-23 months: minimum dietary diversity, minimum meal frequency and their combination, the minimum acceptable diet.

Anaemia is diagnosed from haemoglobin concentration in grams per decilitre. Every survey makes four decisions that change the answer: which blood (capillary from a finger or heel prick, or venous from a vein), which device (a portable haemoglobinometer, or a laboratory analyser), which adjustments (altitude, and smoking in adults) and which cut-off.

Two further traps. First, subgroups such as a district or a caste group are estimated on the full survey design; dropping the other records first understates the standard error. Second, district estimates rest on far smaller samples than national ones, so a three-point change in one district between rounds may be noise. Read the confidence interval before you announce a district's progress or decline.

Mission Poshan 2.0 runs the Poshan Tracker app, launched on 1 March 2021, in which Anganwadi Workers record attendance, take home ration and hot cooked meal delivery and monthly growth measurement. As of March 2026 the system covered about 14,03,170 Anganwadi Centres and 8,95,29,425 eligible beneficiaries (PIB backgrounder, Mission Poshan 2.0, 14 April 2026).

Anthropometry, haemoglobin and diet data on identifiable children are personal data under the Digital Personal Data Protection Act 2023. The Act commences in stages under G.S.R. 843(E) of 13 November 2025. The definitions and the Data Protection Board (ss 18-26) have applied since 13 November 2025. The core duties and rights in ss 3-17, including s9 on children's data and the s17 exemptions, together with the penalties in ss 27-34, apply only from 13 May 2027. The DPDP Rules 2025 (G.S.R. 846(E)) follow the same phasing.

The conceptual framework most nutrition programmes still draw on was published by Urban Jonsson in the Food and Nutrition Bulletin in 1981 and used in the Strategy for Improved Nutrition of Children and Women in Developing Countries adopted by the UNICEF Board in May 1990 (Jonsson, World Nutrition, 2014). It arranges causes in a hierarchy.

UNICEF's Conceptual Framework on the Determinants of Maternal and Child Nutrition, 2020, guides its Nutrition Strategy 2020-2030. It builds on the 1990 work, uses a positive narrative about what produces good nutrition, and names the triple burden explicitly (UNICEF Conceptual Framework on Maternal and Child Nutrition, November 2021).

The split explains a common disappointment. Ten specific interventions at very high coverage were estimated to avert only about a fifth of the stunting burden (Bhutta et al., Lancet, 2013). The rest depends on income, sanitation, women's schooling and status, and food prices, which sit with ministries other than health and women and child development.

The period from conception to a child's second birthday is when growth and brain development are fastest and when damage is hardest to reverse. POSHAN Abhiyaan was designed with special emphasis on these 1,000 days (PIB backgrounder, Mission Poshan 2.0, 14 April 2026).

The 2021 Lancet review found that stunting and wasting may already be present at birth and that the incidence of both peaks in the first six months of life (Victora et al., Lancet, 2021). The 2013 series estimated that maternal undernutrition contributes to 800,000 neonatal deaths a year through small-for-gestational-age births (Bhutta et al., Lancet, 2013).

Anaemia shows the same overlap. The NFHS-5 report lists malaria, hookworm and other helminths, other nutritional deficiencies, chronic infections and genetic conditions as causes besides iron, and estimates that iron deficiency is responsible for about half of anaemia globally (NFHS-5 India Report, 2022, Ch. 10). Deworming reached only 30% of children 6-59 months in the six months before NFHS-5.

The National Family Health Survey is India's Demographic and Health Survey, run by the International Institute for Population Sciences for the Ministry of Health and Family Welfare. NFHS-6 covered 679,238 households in every state and UT except Manipur, in two phases from 28 May 2023 to 31 December 2024. The Ministry released it on 29 May 2026, and the fact sheet marks its results as provisional (NFHS-6 India Fact Sheet, 2026; PIB, 29 May 2026).

The CNNS was run by the Ministry of Health and Family Welfare with UNICEF and the Population Council. It describes itself as the largest micronutrient survey ever conducted: 112,316 children and adolescents aged 0-19 were measured in 30 states, and blood, urine and stool samples were drawn from 51,029 of them (CNNS 2016-18 National Report, 2019, Ch. 2).

Programmes for children under five and for pregnant women have deep roots; adolescents fall between them. Yet adolescence is a second growth spurt, the time when girls' iron needs rise with menstruation, and for many Indian girls the years just before a first pregnancy. A thin, anaemic, short adolescent girl is the mother whose baby is small at birth.

Indian children are on average shorter than children in sub-Saharan Africa, a region that is poorer on average and does worse on many other health indicators. The pattern was dubbed the 'South Asian Enigma' by Ramalingaswami and colleagues in 1996, as Rohini Pande recounts in her 2013 reply in the Economic and Political Weekly. The main explanations offered since fall into four groups.

A third route keeps the standard and adjusts for parents. Karlsson and colleagues estimated maternal height-standardised stunting for 67 low- and middle-income countries: average crude prevalence was 27.8% and standardised prevalence 23.3%, and Guatemala, Bangladesh and Nepal improved their ranking most after adjustment (J Epidemiol, 2022). Maternal height is itself partly the product of the mother's own childhood nutrition, so adjusting for it removes some of what a programme should care about.

Dean Spears documented a strong gradient between child height and sanitation. Across 140 country-years in 65 developing countries, sanitation alone linearly explains 54% of the variation in children's height, and in his decomposition open defecation can account for much or all of India's excess stunting (Spears, World Bank Policy Research Working Paper 6351, February 2013).

Ghosh, Majumder, Sachdev, Kurpad and Thomas extracted 10,384 healthy under-five children, selected by the WHO MGRS criteria, from NFHS-3, NFHS-4, NFHS-5 and the CNNS. Their mean z-scores were significantly below zero (-0.52 to -0.79) and the spread of height- and weight-for-height z-scores was wider than the standard assumes. Applying age-specific corrections reduced NFHS-5 growth faltering by about half; they report a corrected excess risk of 15.5% for height-for-age (Indian Pediatrics, 2023).

Sachdev and colleagues note that WHO's haemoglobin cut-offs were based on five studies of predominantly White adults done over 50 years ago. Using a healthy CNNS subsample of 8,087 children and adolescents (no iron, folate, B12 or retinol deficiency, no inflammation, no haemoglobin variants), they derived cut-offs usually 1-2 g/dL lower. Anaemia prevalence across the CNNS sample fell from 30.0% on WHO cut-offs to 10.8% on theirs (Lancet Global Health, 2021).

In 2001 the People's Union for Civil Liberties petitioned the Supreme Court, arguing that the right to life under Article 21 includes the right to food. In PUCL v Union of India, Writ Petition (Civil) No. 196 of 2001, the Court converted food schemes into legal entitlements through a series of interim orders (Birchfield and Corsi, 'The Right to Life Is the Right to Food', 2010).

The Pradhan Mantri Garib Kalyan Anna Yojana began as a COVID-19 relief measure. On 29 November 2023 the Cabinet decided to provide free foodgrains to about 81.35 crore beneficiaries for five years from 1 January 2024, at an estimated food subsidy of about Rs 11.80 lakh crore, through more than 5 lakh Fair Price Shops (PIB, 29 November 2023).

Section 13 matters for nutrition because it puts the household's food entitlement in a woman's name; Gender & Development 101 covers the household bargaining research behind that choice. Section 8 matters because it turns a failure of supply into a claim against the state. Few beneficiaries know either provision, so an NGO's first nutrition-sensitive step in a block can be a ration card audit: whose name is on the card, and was the allowance paid when the shop was empty?

The Integrated Child Development Services, launched on 2 October 1975, built the Anganwadi network that delivers supplementary nutrition, health services and early childhood care (PIB, 11 October 2024). The Union Budget 2021-22 consolidated Anganwadi Services, the Scheme for Adolescent Girls and POSHAN Abhiyaan into Mission Saksham Anganwadi and Poshan 2.0 (PIB backgrounder, 14 April 2026).

The design question at the centre is take home ration versus hot cooked meal. Hot cooked meals bring children to the centre and are eaten by the child; take home rations reach children under three who do not attend, but can be shared across the household, so monitoring should check who eats them. Poshan 2.0 added face recognition verification for take home ration distribution in the Poshan Tracker (PIB, 5 December 2025). Monitor how many eligible women are turned away when verification fails, since that is a new point of exclusion.

The Cabinet approved the National Nutrition Mission on 30 November 2017 with a three-year budget of Rs 9,046.17 crore from 2017-18 (PIB, 1 December 2017). The Prime Minister launched it at Jhunjhunu, Rajasthan, on International Women's Day, 8 March 2018 (PIB, 8 March 2018). It brings more than 26 ministries and departments under one framework (PIB backgrounder, 14 April 2026).

Why cash for mothers matters for nutrition: a pregnant woman who must keep working in the last trimester eats less and rests less, and Section 3 showed how much stunting starts before birth. The meta-analyses in Section 9 find that cash transfers improve diet diversity and child height modestly. Check, for any scheme, whether the amount, eligibility and documentation meet the s4(b) floor for all pregnant women the Act covers.

In September 2021 the Cabinet approved the national scheme for PM POSHAN in schools, formerly the Mid-Day Meal Scheme, for 2021-22 to 2025-26. It covered about 11.80 crore children in 11.20 lakh government and government-aided schools, with a Central outlay of Rs 54,061.73 crore, Rs 31,733.17 crore from states and UTs and about Rs 45,000 crore of foodgrains (PIB, 29 September 2021).

Each arrow is a place to lose people. Enrolment drops for migrant families and for children under three who do not attend centres. Service drops when supplies are late or verification fails. Consumption drops when a take home ration is shared or sold. Effect drops when the food lacks protein and micronutrients or the child is repeatedly ill. Monitoring that counts only the first two steps will report success while children stay short.

Anemia Mukt Bharat was launched in 2018 to reduce anaemia across the life cycle (PIB explainer, 18 April 2025). It is implemented in all villages, blocks and districts through existing platforms, building on the National Iron Plus Initiative and Weekly Iron Folic Acid Supplementation for adolescents.

NFHS-5 anaemia rose while the strategy ran, which supporters read as a call for more iron and critics read as evidence that the capillary measure and the cut-offs overstate the problem (Section 5). A district team does not need to settle that debate to act sensibly: test with a reliable method, find out what share of anaemic people are iron deficient, treat severe anaemia in pregnancy urgently, and screen for haemoglobin disorders where they are common before universal iron.

Fortified rice kernels carrying iron, folic acid and vitamin B12 are blended with ordinary custom-milled rice to FSSAI standards. About 406 lakh tonnes were distributed through the PDS between 2019-20 and 31 March 2024. The Cabinet made the initiative a 100% centrally funded Central Sector Initiative, estimated at Rs 2,565 crore a year (PIB, 11 October 2024).

For a practitioner the actionable points are narrow. In districts with a high burden of sickle cell disease or thalassaemia, find out how affected households are told about the advisory and what alternative they receive. Everywhere, measure whether fortified kernels are actually present in the rice that reaches the household, since blending happens at the mill. Iron status, measured alongside anaemia, is the outcome that shows whether fortification works.

Salt iodisation is the clearest fortification success in South Asia. The CNNS found adequate iodine status in all three age groups, with median urinary iodine concentrations of 213, 175 and 173 micrograms per litre, and adequate levels in every state except Tamil Nadu, which sat at the lower limit of excess intake (CNNS 2016-18 National Report, 2019, Ch. 7). NFHS-6 found 94.2% of households using iodised salt (NFHS-6 India Fact Sheet, 2026). The PIB note on rice fortification cites iodised salt as the precedent for reducing goitre (PIB, 11 October 2024).

FSSAI launched Eat Right India in July 2018 to promote safe, healthy and sustainable food through regulation, capacity building, collaboration and consumer awareness. It includes a campaign to remove industrial trans fats from the food chain, hygiene ratings and certification of railway stations and street food hubs (PIB, 9 July 2025).

The 2013 Lancet series updated the evidence on interventions for maternal and child undernutrition and modelled their effect in the 34 countries that hold 90% of the world's stunted children (Bhutta et al., Lancet, 2013).

Alive & Thrive combined intensive interpersonal counselling by frontline workers, mass media and community mobilisation, with counselling delivered through a large non-governmental health programme. Twenty sub-districts were randomised to the intensive package or a lighter one, with surveys in 2010 and 2014.

A second Alive & Thrive evaluation integrated nutrition counselling, community mobilisation, free micronutrient supplements and weight-gain monitoring into an existing maternal, neonatal and child health programme in Bangladesh, and compared it with standard antenatal care in a cluster-randomised design (Nguyen et al., Journal of Nutrition, 2017).

This is a general lesson about evidence. A null result in a well-run trial is strong evidence about the intervention tested at the intensity tested. It is weak evidence about a different intervention with the same label. Before citing a trial to stop or start a programme, check that the programme you are deciding on is the thing the trial evaluated. Causal Inference 101 and Impact Evaluation 101 cover external validity.

Biofortification breeds staple crops with higher micronutrient content, so farmers grow the nutrients without a processing step. The FSSAI regulations direct the Food Authority to encourage fortification including through conventional breeding or hybridisation (reg. 8(1)).

Pakistan's National Nutrition Survey 2018 was the fifth since 1965 and the first to give district-representative estimates (NNS 2018 Key Findings Report, published by UNICEF Pakistan).

Sri Lanka's 2016 Demographic and Health Survey, by the Department of Census and Statistics, recorded 17.3% stunting, 15.1% wasting and 20.5% underweight among children under five (SLDHS 2016, Ch. 11, Table 11.1). Ninety percent of children were breastfed within an hour of birth and 82% of infants under six months were exclusively breastfed (SLDHS 2016, Ch. 11).

Illustrative case. A block has 12,000 children aged 6-59 months. A recent survey estimates 18% wasting by weight-for-height and 4% severe acute malnutrition. All numbers on this slide are Illustrative.

Illustrative case. A district with 40% stunting is asked to reach 30% in three years. The question is whether that is realistic.