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B12 low on your report? What it means if you’re vegetarian.

About half of Indians run low on B12. Here’s how to read your number, why it happens, and what food can and can’t do.

6 min read · Updated

A young man in a blue shirt smiles at his phone at an office window table, with a steel tiffin of rice and sabzi and a glass of milk.

The short version

  1. 1

    About half of Indians are low in B12. In a Pune study, vegetarians had 4.4 times the risk.8,10

  2. 2

    Labs draw the line in different places. By UK guidance, under 180 is a deficiency and 180–350 a grey zone, where an MMA test helps.1,4

  3. 3

    Dal, sabzi, fruit and grains have no B12 of their own. Milk, curd, paneer and eggs help, but a real deficiency needs your doctor.1,6,7

Your number

Where does your B12 sit?

Slide the dot to the B12 on your report.

260pg/mL

Grey zone

180–350 is “indeterminate”: some people are deficient, some aren’t. With symptoms, ask about a methylmalonic acid (MMA) test.

Slide to your own number. pg/mL is the same as ng/L. MedlinePlus (US) lists 299–1,054 pg/mL as normal, so go by the range printed on your report.1,2

Your CBC can hint at it too: a high MCV (over 100 fL, meaning large red cells) is a reason to check B12. But a normal CBC doesn’t rule it out. More in our CBC guide.1,15

India

Half the country is short

~50%
of Indians are low in B12, a 2026 review estimates: 48% of adults and 62% of older people.10
81%
of urban middle-class men in a Pune study had low B12. Vegetarians had 4.4 times the risk.8

Indian studies use different cut-offs, so read these as a rough guide.9

Why it happens

It isn’t only about being vegetarian

Little or no meat, fish or eggs
B12 comes from animal foods, and NICE lists diets without meat among the risks. The body’s stores last 2–5 years, so a shortfall builds slowly.1,5,6
Metformin
In a US diabetes study, low or borderline B12 was twice as common after 5 years on metformin: 19.1% against 9.5%.12
Medicines for acidity
Two years or more of a PPI raised the odds of deficiency by 65%, and of an H2 blocker by 25%.13
Pernicious anaemia
The immune system attacks the stomach cells needed to absorb B12. It’s more common in women around 60 and in people with another autoimmune condition.5
Age, gut surgery and more
Being over 75, stomach or bowel surgery (weight-loss surgery included), Crohn’s or coeliac disease, heavy drinking, and some other medicines.1,3,5

Symptoms

What low B12 can look like

How often each sign showed up in 220 people already diagnosed with deficiency.

  • Pins and needles98%
  • Large red cells on the CBC89%
  • Anaemia88%
  • Skin changes38%
A North Indian hospital series, 2022: it shows what deficiency looks like, not how common it is. 86% were strict vegetarians.11

Other signs: tiredness, breathlessness, a sore red tongue or mouth ulcers, numbness, poor balance, trouble with memory or concentration, vision changes and low mood. If treatment is delayed, some nerve damage can be permanent.1,5

On your plate

Vegetarian B12, per serving

Sort
Food and servingB12 per servingPer 100 g
Paneer1650 g1.3 µg2.6 µgrecipe estimate
Milk, whole161 glass (200 ml)0.9 µg0.5 µg
Curd (dahi)161 katori (150 g)0.6 µg0.4 µg
Egg161 large egg (50 g)0.5 µg0.9 µg
Cheese (mozzarella)1620 g0.5 µg2.3 µg
US values (USDA): India’s food tables have no B12 data, so Indian milk and paneer may differ. Some cereals and soy products, and “+F” fortified rice, have B12 added: check the label.5,16,17

For scale, the NHS puts an adult’s need at about 1.5 µg a day from food. Food keeps levels up, but it may not correct a true deficiency, especially when the cause is absorption. Your doctor decides between tablets and injections, and the dose.1,6,7

If you’re low

What the next few months look like

  1. Before

    Test first

    Don’t start B12 on your own: it can raise the number without fixing the deficiency.1

  2. Weeks 1–2

    Early change

    Once treatment starts, symptoms may begin to ease within 2 weeks.1

  3. Up to 3 months

    Review

    Recovery can take up to 3 months, and NICE suggests a follow-up visit around then.1

  4. Later

    Retest if needed

    If a first test was normal but symptoms continue 3–6 months on, NICE says to consider testing again.1

Myths

What you might hear

  • They say

    “Dal, sprouts and sabzi give me B12.”

    Actually

    B12 isn’t found naturally in fruit, vegetables or grains.6,14

  • They say

    “Spirulina is a vegan B12 source.”

    Actually

    It’s mostly pseudo-B12, which the body can’t use.14

  • They say

    “My haemoglobin is normal, so my B12 is fine.”

    Actually

    NICE says not to rule out deficiency just because there’s no anaemia or large red cells.1

  • They say

    “250 is inside my lab’s range, so I’m fine.”

    Actually

    It’s in NICE’s grey zone. With symptoms, ask about an MMA test.1,4

  • They say

    “My folic acid tablet covers it.”

    Actually

    Folic acid can hide a B12 deficiency, so doctors check B12 first.5

See a doctor soon if

  • You have numbness, pins and needles, unsteady walking or falls, vision changes, memory problems or confusion.
  • You feel low or anxious along with other signs of low B12.
  • You’re breathless, your heart races, or your tongue is sore and red, with tiredness.
  • You’re pregnant or breastfeeding and might be low: NICE advises considering treatment even in the grey zone.

Don’t wait when anaemia and nerve symptoms come together. Some nerve damage can become permanent.

Signs and advice from NICE and the NHS.1,5

Questions

Questions people ask

B12 kam ho to kya khana chahiye? (What should I eat if my B12 is low?)

Have milk, curd and paneer daily, plus eggs if you eat them, and foods with B12 added. Plant foods don’t contain B12 naturally. If the test shows a real deficiency, food alone may not fix it: your doctor decides on tablets or injections, and the dose.

What is a normal B12 level?

It depends on the lab. NICE says deficiency is unlikely above 350 ng/L (pg/mL), possible between 180 and 350, and confirmed below 180. MedlinePlus gives 299–1,054 pg/mL as normal. Read the range on your own report.

Why am I low when I drink milk every day?

Milk has only small amounts of B12. Other causes include metformin, long-term medicines for acidity, pernicious anaemia, age and gut problems.

Can low B12 cause tingling or memory problems?

Yes. Pins and needles, numbness, balance trouble and memory or concentration problems are common signs. If treatment is delayed, some nerve damage can be permanent.

How long does recovery take?

Symptoms may start to improve within 2 weeks of treatment but can take up to 3 months. Doctors usually review you at about 3 months.

Should I test again after starting supplements?

Get tested before you start, because supplements can raise the number without fixing the problem. After that, follow your doctor’s review schedule.

Sources

  1. 1.NICE. NG239: Vitamin B12 deficiency in over 16s: diagnosis and management, 2024.
  2. 2.MedlinePlus: Vitamin B12 level.
  3. 3.MedlinePlus: Vitamin B test.
  4. 4.MedlinePlus: Methylmalonic acid (MMA) test.
  5. 5.NHS: Vitamin B12 or folate deficiency anaemia.
  6. 6.NHS: Vitamins and minerals, vitamin B.
  7. 7.ICMR-NIN. Dietary Guidelines for Indians, 2024.
  8. 8.Yajnik CS et al. Vitamin B12 deficiency and hyperhomocysteinemia in rural and urban Indians. J Assoc Physicians India, 2006.
  9. 9.Malik A, Trilok-Kumar G. Status of vitamin B12 among healthy adult and elderly population in India: a review. J Nutr Sci Vitaminol, 2020.
  10. 10.Toteja GS, Toteja N. Vitamin B12 deficiency: epidemiological trends and risk factors. Front Nutr, 2026.
  11. 11.Singh J et al. Vitamin B12 deficiency in a northern India tertiary care setting. J Family Med Prim Care, 2022.
  12. 12.Aroda VR et al. Long-term metformin use and vitamin B12 deficiency in the DPP Outcomes Study. J Clin Endocrinol Metab, 2016.
  13. 13.Lam JR et al. Proton pump inhibitor and histamine 2 receptor antagonist use and vitamin B12 deficiency. JAMA, 2013.
  14. 14.Watanabe F et al. Vitamin B12-containing plant food sources for vegetarians. Nutrients, 2014.
  15. 15.Kaferle J, Strzoda CE. Evaluation of macrocytosis. Am Fam Physician, 2009.
  16. 16.USDA Agricultural Research Service. FoodData Central.
  17. 17.Press Information Bureau: Rice fortification with iron, folic acid and vitamin B12 (2022).

Swastya shares health education, not medical advice. Lab ranges vary by lab, age and condition, so read your numbers with your doctor, and see a doctor promptly for any symptom that worries you.

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