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Biochemistry Vitamins Home collection available

Vitamin B12 (Serum)

Also known as: Cyanocobalamin

Parameters1 tested
SampleBlood
FastingNot required
Report inSame day

How to prepare

No fasting needed

You can eat and drink normally before the test.

Good to know

Fasting for 6–8 hours is preferred.

Medicines

Tell our phlebotomist about any medicines you take. Don't stop them without asking your doctor.

Comfortable clothes

Wear a loose sleeve so the sample can be taken easily from your arm.

How it works

Book onlinePick a time slot
Home visitSealed, sterile kit
Lab testingBarcode tracked
ReportIn same day

About this test

Vitamin B12 is needed to make red blood cells and keep nerves healthy. Deficiency is common in vegetarians and older people, and can cause anaemia and nerve problems.

Why is this test done?

  • Check for B12 deficiency
  • Find the cause of tingling, numbness or anaemia
  • Monitor supplements
  • People on metformin or acidity medicines

Symptoms — when should you get tested?

  • Tingling or numbness in hands and feet
  • Tiredness and weakness
  • Memory problems or low mood
  • Pale skin
  • Sore tongue or mouth ulcers

Normal range

Adults 200 – 900 pg/mL

Reference ranges differ slightly between labs, methods, age and sex. Always discuss your report with your doctor.

If your result is high

A high B12 is usually from supplements; rarely it points to liver or blood disorders.

Common reasons
  • B12 supplements or injections
  • Liver disease

If your result is low

Low B12 can cause anaemia and nerve damage if not treated.

Common reasons
  • Vegetarian or vegan diet
  • Long-term metformin or antacids
  • Poor absorption (stomach problems)
  • Older age

How is the test done?

  1. 1
    Book online

    Choose your slot for home collection or a visit to our centre.

  2. 2
    Blood sample taken

    A trained phlebotomist takes a small blood sample from a vein in your arm with a sealed, single-use needle. It takes about 2 minutes.

  3. 3
    Tested in our lab

    Your barcoded sample is tested on automated machines with strict quality checks.

  4. 4
    Report on WhatsApp

    A pathologist checks the result and the report reaches you on WhatsApp and email.

Save more with a health package

This test is also included in these checkups along with many other tests.

Full Body Checkup – Advanced 14 tests · 31 parameters
Contact for price
Senior Citizen Health Checkup 13 tests · 27 parameters
Contact for price
Women's Wellness Checkup 10 tests · 18 parameters
Contact for price

Frequently asked questions

No fasting is needed for this test. You can eat and drink normally.

Your report is usually ready in same day after the sample reaches our lab. We send it on WhatsApp and email, and you can also download it from the Reports page.

Please call our team to confirm whether home sample collection is available for your location and test.

This test needs a blood sample. Fasting for 6–8 hours is preferred.

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