“Why is your body lacking Vitamin D? These 8 reasons may be responsible.”
Health News, 2 Dec 2025 (BNN Web Staff)
Vitamin-D deficiency has become a silent epidemic in India — studies show that over 70–90 % of Indians have insufficient levels. This leads to weaker bones, low immunity, muscle pain, fatigue, frequent illnesses, and even depression-like symptoms. Yet India receives abundant sunshine year-round. So why is this deficiency so widespread?
Here are the 8 biggest culprits behind low Vitamin-D levels:
- Too Little Sun Exposure Modern lifestyles keep most people indoors — offices, homes, cars, and screens. Many cover up completely (full sleeves, scarves, gloves) or apply high-SPF sunscreen every time they step out, which blocks the UVB rays needed for Vitamin-D synthesis. Rising air pollution also forces people to stay inside or wear masks.
- Very Few Natural Food Sources Only a handful of foods naturally contain Vitamin-D: fatty fish (salmon, mackerel, sardines), egg yolks, cod liver oil, and certain mushrooms exposed to UV light. Most Indian diets (especially vegetarian ones) lack these, and fortified foods (milk, orange juice, cereals) are still not widely consumed.
- Darker Skin Tone Melanin, the pigment that gives skin its colour, acts as a natural sunscreen. People with darker skin need 3–5 times longer sun exposure than fair-skinned individuals to produce the same amount of Vitamin-D. This puts a huge portion of the Indian population at higher risk.
- Ageing As we grow older, the skin becomes thinner and less efficient at producing Vitamin-D. The kidneys also become less able to convert it into its active form. Senior citizens are therefore especially vulnerable.
- Obesity Vitamin-D is fat-soluble, meaning excess body fat “traps” it in fat cells, making it unavailable for use. People with higher BMI consistently show lower blood Vitamin-D levels.
- Certain Medical Conditions & Medications Diseases that affect fat absorption or Vitamin-D metabolism — such as celiac disease, Crohn’s disease, chronic kidney or liver disease, and cystic fibrosis — increase deficiency risk. Long-term use of medicines like anti-seizure drugs, glucocorticoids, anti-fungal medicines, and some HIV medications can also interfere.
- Geography & Seasonal Changes Even in India, winter sunlight in northern states and hilly areas is weaker and more slanted, reducing UVB penetration. Smog and fog during winter months further block rays. People living farther from the equator worldwide face the same seasonal drop.
- Pregnancy & Breastfeeding Pregnant and lactating women need almost double the normal amount of Vitamin-D for themselves and their babies. Deficiency in the mother directly affects the child’s bone health and immunity.
The Bottom Line
Vitamin-D deficiency in India is rarely caused by just one factor — it’s usually a combination of indoor lifestyles, covered clothing, darker skin, poor dietary sources, and other health or seasonal factors.
Simple fixes that help most people:
- 15–30 minutes of midday sun exposure (arms and legs uncovered, no sunscreen) a few times a week
- Adding fortified foods or safe supplements (always after a blood test and doctor’s advice)
- Maintaining a healthy weight and treating underlying medical conditions
Getting your 25(OH) Vitamin-D blood level checked is the only way to know where you stand — and it’s a test worth doing!
