An interactive explorer of why mean adult height in India has stagnated for a century while China, South Korea, Japan and the Netherlands rose sharply, focusing on the largest modifiable driver — animal-source-protein intake — and the politics of removing eggs from children's school meals.
A Century Short
India's young men gained 3 cm in a hundred years. Japan and South Korea started shorter — and are now 6–10 cm taller. Height is built, not inherited; the biggest lever you can pull is the plate, and the politics is pulling it the wrong way.
This week a newly-elected state government handed Kolkata's school-meal kitchens to a vegetarian religious order, taking eggs off the plate of poor children in one of India's most fish-and-meat-eating states. Every few months the egg fight resurfaces somewhere; the argument is always that a vegetarian plate can do the same nutritional work.
It is worth asking what the data says, because nutrition is the reason humans got taller — Northern Europe a century ago, China and Korea in living memory. Height is one of the cleanest long-run readings of childhood net nutrition we have. So why has India barely moved? Several things bind at once, but the largest one a government can actually change is what goes on the plate — and the egg removes the cheapest key to it.
Mean height, by country
Adult height by year of birth, 1896–1996. India and Bangladesh sit in a flat cluster at the bottom; Japan and Korea began shorter than India and crossed over it within two generations — the proof that this gap is built, not inherited.
Source: NCD-RisC, eLife 2016 · mean height of 18-year-olds · shaded band = India 95% interval
Animal protein eaten per person
Grams of animal protein available per person per day. China and Korea's lines climb with their meat boom; India's barely lifts. India is not short of total protein — it is short of the animal-source protein (meat, eggs, fish, dairy) that builds height most efficiently.
Mechanism: animal-source protein carries the indispensable amino acids and micronutrients (B12, zinc, iron) that linear growth needs. An egg is the cheapest dense source a school meal can deliver.
Source: FAO Food Balance Sheets via Our World in Data, to 2022/23
Height against animal protein — across the world
Each dot is a country: adult men's height (born 1996) against animal-protein supply. The relationship is strong (r = 0.74) and India sits at the low-protein, low-height corner. But India also falls below the line — more protein would predict a slightly taller India than we see, a reminder that diet is most of the story, not all of it (see caveats).
Source: NCD-RisC · FAO/Our World in Data · 173 countries · line = ordinary least squares fit (r = 0.74)
Protein explains most of the gap between countries, and India is short of it. The cross-country line says diet is not the whole story — India falls a little below it, because a child's gut and its mother's nutrition also bound how tall it grows (those are real, and outside the frame of this asset). But of everything that sets adult height, the plate is the lever that is cheapest, fastest, and most directly a policy choice. It also turns slowly: childhood diet shows up in adult height on a 20–30 year delay, so a key removed today is a deficit banked for a generation. Which is why taking eggs off poor children's plates is not a small symbolic fight — it is the one lever moving in the wrong direction.
The egg, June 2026
West Bengal's first BJP government used its opening budget to hand mid-day-meal kitchens in Kolkata to ISKCON, a strictly vegetarian order — dropping eggs, onion and garlic. The state is overwhelmingly non-vegetarian; teachers report attendance rises on egg days. The RSS chief had said in November that government policy should promote vegetarianism.
The official line is that vegetarian alternatives carry "the same protein." On the dimension that builds height — animal-source protein delivered cheaply to a poor child — the chart above is the test of that claim.
- Modelled estimates. NCD-RisC heights are statistical reconstructions from population surveys, each with an uncertainty interval (shown for India on hover). Treat small year-to-year wiggles as noise; read the century-scale shape.
- Diet is not the only driver. Two other forces matter and are deliberately left out of frame here: the disease environment (poor sanitation causes chronic gut inflammation that wastes nutrients) and maternal nutrition (a short, anaemic mother sets a child's ceiling before birth). They are why India sits below the protein line. This asset isolates the largest modifiable, policy-facing lever, not a closed causal model.
- Correlation, not proof. The protein–height relationship co-moves with income and much else; the scatter shows the size and direction of the association, not causation on its own.
- Cohort lag. Childhood conditions set adult height ~20–30 years later. A diet change made today will not register in adult height until the 2040s — which is exactly why a key removed now matters now.
- Culture, not only poverty. India's low animal-protein intake is substantially a vegetarian preference, not pure affordability — which is precisely why the egg is a policy choice rather than a budget constraint.
- Genetics, acknowledged and set aside. Population genetic potential differs somewhat, but the secular trend itself — Korea and Japan overtaking India from a lower start within a century — shows environment dominates over this timescale.