New Delhi:It’s a line every Indian doctor hears almost daily: “Doctor, I eat so little… so why am I still gaining weight?” For millions of Indians, this isn’t an excuse; it’s a lived reality. The nation's rates of obesity, PCOS, Type 2 diabetes, and fatty liver are still skyrocketing despite having smaller portions than most Western diets. According to research, the issue is not just how much we eat, but rather how our bodies process the food.
According to Dr Jatin Kumar Majhi, Associate Consultant – Endocrinology, Manipal Hospital Bhubaneswar, the answer lies in a complex web of metabolism, genetics, childhood nutrition, stress, and the modern Indian lifestyle.
1. The “thin–fat” Indian body: a real medical phenomenon
It is specifically prevalent in South Asians and is referred to by scientists as the thin-fat phenotype. Indians typically possess:
Increased visceral fat even at a healthy weightReduced muscle massHigher inflammation and insulin resistanceSo two people eating the same meal may store and burn calories completely differently. Indians simply have a metabolism that favors storing fat over gaining muscle. Even when a person "looks thin," visceral fat acts like a hormonal organ, increasing the risk of metabolic syndrome and diabetes.
This is why being slim doesn’t always equal being healthy.
2. High-carb staples = frequent insulin spikes
Another major factor? Our plate.
Typical Indian diets revolve around refined carbs: roti, rice, poha, idli, biscuits, namkeen, potatoes, and chai with sugar.
Frequent insulin spikes result from these foods' rapid breakdown into glucose. Additionally, insulin is more than just a hormone that controls blood sugar levels.
the body’s primary fat-storing hormone.
Therefore, a diet high in carbohydrates encourages the body to accumulate more fat even when eating "normal" portions.
3. The protein gap that slows metabolism
3. The protein gap that slows metabolism
Dr Majhi notes that low protein:
slows metabolismreduces satietyhinders the repair of musclesencourages fat gainProtein is essential for building muscle, and muscle is the engine that burns calories. Without it, metabolism naturally drops.
4. The rise of ultra-processed foods
Modern India consumes far more ultra-processed foods than ever before, including packaged namkeen, bakery biscuits, and instant noodles.
These foods cause overeating, disrupt hunger signals, change gut hormones, and significantly slow metabolic rate. They also replace nutrient-dense traditional meals, pushing the body into a chronic “nutrient-poor” state.
5. The change to a sedentary lifestyle
Indians now spend more time sitting on screens, in offices, and in traffic than any previous generation.
Low mobility results in:
Decreased burning of caloriesLow sensitivity to insulinReduced metabolism of fatPhysical activity was ingrained in earlier generations through commuting and household chores. Nowadays, weight accumulates even with fewer calories if movement is not deliberate.
6. Stress, cortisol spikes and poor sleep
Stress hormones are a major factor in the Indian fat problem. Chronic stress increases cortisol, which:
causes a craving for carbohydratesstores more fat around the abdomendisrupts sleep, slowing metabolism furtherModern Indian lifestyles, deadlines, commute hours, social pressure keep cortisol chronically elevated.
7. Genetics and childhood nutrition matter too
Many Indians start life at a disadvantage. According to studies, undernutrition in mothers frequently results in Indian babies having less muscle mass at birth.
This low-muscle biology tracks into adulthood, making fat gain easier and muscle gain harder. When you combine that with diets high in carbohydrates during childhood, the groundwork for metabolic problems in adulthood is already established.
Indians aren’t gaining fat because they’re overeating.
Their biology, diet, lifestyle, and stress cause their metabolism to switch to a fat-storing mode, which is why they are gaining weight.
The solution? Not starvation, but a more sensible diet, increased protein consumption, strength training, and a more tranquil way of living. Because solving the metabolism puzzle affects everything after it and begins long before the plate.
Also read: