Thin at 7, obese by 9: Study reveals India's growing childhood nutrition crisis
Children in India are facing two contrasting forms of malnutrition at the same time, according to a new study that found persistent thinness alongside a sharp rise in overweight and obesity by the age of nine.
For years, malnutrition in India has been associated with underweight children. But a new study from Vellore suggests that the problem is becoming far more complex, with many children now facing both undernutrition and obesity before they reach their teens.
Researchers tracking children from birth found that while thinness remained common, the number of children who were overweight or obese nearly tripled between the ages of seven and nine, highlighting what the World Health Organisation calls the "double burden of malnutrition", the coexistence of undernutrition and overweight within the same population.
The Lancet study, led by researchers from Christian Medical College Vellore and the Tata Institute of Fundamental Research, followed 251 children born in a low-income urban community in Vellore.
Of these, 205 children were tracked until the age of nine.
The findings showed that most children had a healthy body mass index (BMI) during their first five years. However, by age seven, 26.3% of children were classified as thin, while 5.2% were overweight or obese. Just two years later, thinness remained high at 21.6%, but overweight and obesity had climbed sharply to 14.6%.
"Our findings show that children in low-income urban communities are now facing both thinness and emerging obesity before they even enter their teens," said Beena Koshy of CMC Vellore. "Malnutrition in India is no longer just about underweight toddlers, but about the entire childhood years."
The researchers also found that children born to underweight mothers or with low birth weight were more likely to remain thin as they grew older, suggesting that poor nutrition can pass from one generation to the next.
At the same time, children born with a normal birth weight were more likely to become overweight by the age of nine, reflecting the impact of changing diets and increasingly sedentary lifestyles in rapidly urbanising communities.
According to Nihal Thomas of CMC Vellore, both forms of malnutrition carry long-term health risks.
Persistent undernutrition can lead to stunting and even increase the risk of diabetes in lean individuals because of impaired insulin production.
On the other hand, excess body fat combined with physical inactivity raises the risk of obesity, diabetes, high blood pressure and heart disease later in life.
The researchers say the findings point to a critical window between the ages of seven and nine, when children's metabolic health begins to change rapidly.
They argue that India's nutrition programmes should not stop after the first 1,000 days of life.
Instead, growth monitoring, healthy school meals, better nutrition and opportunities for physical activity should continue through the primary school years to tackle both undernutrition and rising obesity before they become lifelong health problems.
For years, malnutrition in India has been associated with underweight children. But a new study from Vellore suggests that the problem is becoming far more complex, with many children now facing both undernutrition and obesity before they reach their teens.
Researchers tracking children from birth found that while thinness remained common, the number of children who were overweight or obese nearly tripled between the ages of seven and nine, highlighting what the World Health Organisation calls the "double burden of malnutrition", the coexistence of undernutrition and overweight within the same population.
The Lancet study, led by researchers from Christian Medical College Vellore and the Tata Institute of Fundamental Research, followed 251 children born in a low-income urban community in Vellore.
Of these, 205 children were tracked until the age of nine.
The findings showed that most children had a healthy body mass index (BMI) during their first five years. However, by age seven, 26.3% of children were classified as thin, while 5.2% were overweight or obese. Just two years later, thinness remained high at 21.6%, but overweight and obesity had climbed sharply to 14.6%.
"Our findings show that children in low-income urban communities are now facing both thinness and emerging obesity before they even enter their teens," said Beena Koshy of CMC Vellore. "Malnutrition in India is no longer just about underweight toddlers, but about the entire childhood years."
The researchers also found that children born to underweight mothers or with low birth weight were more likely to remain thin as they grew older, suggesting that poor nutrition can pass from one generation to the next.
At the same time, children born with a normal birth weight were more likely to become overweight by the age of nine, reflecting the impact of changing diets and increasingly sedentary lifestyles in rapidly urbanising communities.
According to Nihal Thomas of CMC Vellore, both forms of malnutrition carry long-term health risks.
Persistent undernutrition can lead to stunting and even increase the risk of diabetes in lean individuals because of impaired insulin production.
On the other hand, excess body fat combined with physical inactivity raises the risk of obesity, diabetes, high blood pressure and heart disease later in life.
The researchers say the findings point to a critical window between the ages of seven and nine, when children's metabolic health begins to change rapidly.
They argue that India's nutrition programmes should not stop after the first 1,000 days of life.
Instead, growth monitoring, healthy school meals, better nutrition and opportunities for physical activity should continue through the primary school years to tackle both undernutrition and rising obesity before they become lifelong health problems.
