Although an inactive lifestyle is often cited as the cause of rising obesity, which is widely discussed in the modern digital world, data from the latest National Family Health Survey (NFHS-6) indicates a more complex picture. These data show that the proportion of people with a normal Body Mass Index (BMI) in India has stopped decreasing, while the number of people with overweight and obesity is growing.
As a result, the share of women with a normal BMI decreased from 57.3% to 49.6%, representing a drop of 7.7 percentage points.
BMI is calculated by dividing weight in kilograms by the square of height in meters. According to the NFHS classification, a BMI below 18.5 is considered underweight, and a BMI of 25 or higher is considered overweight or obese. Since the report does not specify the normal range between these values, the publication TOI calculated it by subtracting the two published shares from 100.
Reversal Trend in Low BMI
NFHS-6 is the first round in which the proportion of people with underweight BMI has increased among both sexes and men. The male share, which was previously lower than the female share in every previous round, has now equaled it at 19.7%. Regarding overweight, it has continuously risen: among women, it increased from 12.6% to 30.7% since NFHS-3, and among men, from 9.3% to 27.3%.
State-wise Situation
When comparing by state, the NFHS-6 report showed that only seven out of 35 states and territories had a calculated normal BMI share below 50% in NFHS-5; however, this number rose to 16 in NFHS-6. Thus, in 16 states, more than half of women aged 15–49 either are overweight or suffer from underweight. The situation for men has changed: if only one state, Puducherry, had a share below 50% in NFHS-5, then 11 such states were found in NFHS-6.
Urban vs. Rural Differences
State-level data indicate that this problem is not limited to a few isolated areas. Dr. Sajadjit Banerjee, a specialist in internal medicine and geriatrics based in Kolkata, notes that as a city doctor, he observes a predominant trend towards weight gain. Patients increasingly seek advice regarding semaglutide and tirzepatide medications after reading about them, whereas those whose BMI remains within acceptable limits are advised to change their lifestyle.
Analysis at the district level also showed that a normal BMI can conceal muscle loss and excess fat, and blood sugar levels have also increased.


