India has one of the world’s largest vegetarian populations and some of the world’s strongest sunlight — yet more than half of Indians are low in Vitamin B12, and up to 90% are low in Vitamin D. Here’s why this happens, and what it actually does to your body.
Compared to the rest of the world, India’s vegetarian population is unusually large.
- The United States has around 5% vegetarians.
- Germany has around 8–10%.
- Japan, Brazil, and Russia all have less than 5%.
- India has around 30–39% vegetarians — roughly one in every three people.
Because India’s population is so large, a huge share of the world’s vegetarians live in India.
What Do the Numbers Say About B12 and Vitamin D in India?
A 2025 analysis combining 20 studies and data from 18,750 people found:
- About 51% of Indians have a Vitamin B12 deficiency — reaching up to 65% in some groups.
- Among pregnant women, this number climbs to around 67%.
- Despite being one of the sunniest countries in the world, 70–90% of Indians are low in Vitamin D.
- A 2025 report by ICRIER found signs of rickets in 46% of children aged 0–10.
- Around 80–90% of elderly Indians are at risk of osteoporosis (weak, brittle bones).
- In a separate multicentric study, only 42% of Indian children aged 5–18 had normal Vitamin D levels.
(Source: India’s Unseen Nutritional Emergency: A Meta-analysis of Vitamin B12 Deficiency)
What Does Vitamin B12 Actually Do in Your Body?
B12’s most important job is protecting your nerves.
- Every nerve in your body is covered by a protective layer, similar to the plastic coating on an electrical wire.
- This layer is called the myelin sheath, and it helps brain signals travel at full speed without “leaking.”
- Your body needs a steady supply of B12 to build and maintain this layer.
- When B12 runs low, this protective coating slowly wears down over time.
What Happens When B12 Runs Low?
Many early symptoms are easy to mistake for simple tiredness.
- Tingling or “pins and needles” in the feet
- Numbness in the fingers
- A burning sensation in the feet
- Balance trouble while walking
- Memory problems and forgetting words mid-conversation
- A general mental fog or dullness
Long-term, low B12 levels have also been linked to a higher risk of cognitive decline in older adults.
A study at a North India tertiary care hospital looked at 220 patients with confirmed B12 deficiency:
- Over 86% of them were pure vegetarians.
- More than 98% had tingling or numbness in their hands and feet.
- Around 95% reported heaviness or pain in the head.
- More than half already showed confirmed nerve damage on testing.
Why Is B12 Deficiency So Common in a Vegetarian Diet?
B12 doesn’t exist in any plant-based food — not even in small amounts.
- It’s not in lentils, vegetables, rice, roti, fruits, or dry fruits.
- B12 is made by specific bacteria and builds up inside animal bodies.
- For vegetarians, the only real dietary source is milk and milk products.
- Getting enough B12 this way requires a good, consistent daily amount of milk, curd, or paneer — and many households don’t reach that amount, whether due to cost, habit, or simply having a small splash of milk in their tea.
The Hidden Danger — Why Blood Tests Can Look Normal
This is the part most people, and sometimes even doctors, miss.
- B12 deficiency causes two problems: anemia (low blood count) and nerve damage.
- Folic acid (Vitamin B9) is common in green vegetables and grains, and in India, wheat flour is often fortified with it — a good policy that helps prevent birth defects in babies.
- But folic acid has a hidden side effect: it can mask the anemia symptoms of B12 deficiency, making blood reports look completely normal.
- The problem is, folic acid cannot protect your nerves.
- So the nerve damage can continue silently, even while blood tests suggest everything is fine.
- By the time symptoms become obvious enough to see a doctor, some of the damage may already be permanent.
This is why it’s sometimes called a “silent deficiency” — it works quietly, without loud warning signs.
Is Vegetarianism the Problem?
No — this isn’t an argument against vegetarian diets.
- Global research shows real benefits to vegetarian diets, and evidence for this comes from India itself.
- The real issue isn’t vegetarianism — it’s assuming that “vegetarian” automatically means “nutritionally complete,” without ever checking.
The Sunlight Paradox — Why Vitamin D Deficiency Is So High Anyway
India gets plenty of sunlight, yet Vitamin D deficiency remains extremely common. A few reasons explain this:
People often avoid direct sunlight. Indian sunlight can feel too intense, so many people stay indoors or in air-conditioned spaces and avoid stepping out in the midday sun.
Clothing often covers most of the skin. Cultural and practical clothing choices mean less skin is exposed to sunlight, which is part of why deficiency tends to be more common in women.
Darker skin needs more sun exposure. Melanin acts like a natural sunscreen, which is protective — but it also means darker skin needs longer sun exposure to produce the same amount of Vitamin D as lighter skin.
Pollution blocks the right kind of sunlight. Vitamin D production needs a specific type of ray (UVB), and polluted city air can block a significant portion of it — so even standing in the sun may not be as effective in a polluted city.
Why Low B12 and Low Vitamin D Is a Double Problem
These two deficiencies often show up together, and that makes things worse.
- Vitamin D is needed for your body to properly use calcium.
- Without enough Vitamin D, calcium struggles to reach your bones — leading to weaker bones over time.
- At the same time, low B12 is weakening your nerves.
- The result: weaker bones on one side, and weaker nerves on the other, often in the same person.
How Did This Happen Over Time?
For generations, Indian food traditions were built around ideas of purity and simplicity, not nutrition science.
- This approach worked reasonably well when people worked outdoors in the fields, spent most of the day in natural sunlight, and had fresh milk, curd, and ghee at home from their own animals.
- As families moved to cities, sunlight was replaced with air-conditioning, and fresh milk was replaced with packaged milk or a small amount added to tea.
- The idea of the meal — what’s considered “pure” or traditional — largely stayed the same.
- But the actual nutrition behind that meal changed significantly, without most people realizing it.
Some countries have addressed this at a policy level by fortifying everyday foods like milk, cereal, and flour with B12 and Vitamin D, so people get enough without having to think about it. In India, this kind of fortification is still in an early stage.
What Can You Do About It?
- Get tested once a year after age 25. A simple B12 and Vitamin D check can catch a problem early.
- Get tested immediately if you notice symptoms like tingling, numbness, or memory issues — don’t wait, since a “normal” blood report doesn’t always rule out B12 deficiency.
- Improve your daily diet. Make sure you’re getting a proper amount of milk, curd, or paneer each day — a small splash of milk in tea isn’t enough.
- Consider a supplement if your doctor recommends one. Taking a B12 supplement under medical guidance isn’t a sign of failure — it simply fills a gap your diet may be missing.
- Get sunlight the right way. Sit with your hands and feet exposed to gentle morning or evening sunlight for a few minutes daily. Sitting behind a glass window doesn’t count, since glass blocks the UV rays your body needs.
Getting the Right Guidance
Understanding what your body actually needs — beyond just what feels “pure” or traditional — matters more than most people realize.
ConsultGrab can help connect you with the right specialist, including general physicians, to get properly tested and guided on deficiencies like these, so you’re making decisions based on facts, not assumptions.
Frequently Asked Questions (FAQs)
Vitamin B12 doesn't exist in any plant-based food. For vegetarians, the only dietary source is milk and dairy products, and many people don't consume enough of them daily.
Yes. Folic acid fortification in foods like wheat flour can mask the anemia symptoms of B12 deficiency, making blood reports look normal even when nerve damage is developing.
Several reasons combine: avoiding direct sun exposure, clothing that covers most of the skin, darker skin needing more sun exposure, and pollution blocking the specific rays needed for Vitamin D production.
Common symptoms include tingling or numbness in the hands and feet, a burning sensation in the feet, balance issues, memory problems, and mental fog.
This depends on your individual levels and diet. If a blood test shows low B12, a doctor-recommended supplement can help fill the gap.
Spend a few minutes daily with your hands and feet exposed to gentle sunlight, ideally in the morning or evening. Sitting behind glass doesn't work, since glass blocks the UV rays needed.
This article is for general information only. Please consult your doctor before starting any test or supplement.
