Vitamin B12 Acitve (Holo Transcobalamin)

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Includes 1 Parameter
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Rs.1680
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Sample Type
  • Blood
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Test Code
#BI091
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Fasting
No
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Report Within
4 - 5 Days

The Vitamin B12 Active test, also known as Holo Transcobalamin (Holo-TC), measures the biologically active form of Vitamin B12, the portion actually available for cellular uptake and metabolic function.

Unlike the regular Vitamin B12 test, which measures total B12 (much of which is inactive), the Holo-TC test detects deficiency much earlier, making it more sensitive and clinically reliable.

This test plays a key role in diagnosing early B12 deficiency, anemia, nerve issues, memory concerns, and metabolic disorders.

At Torrent Diagnostics, the test is performed using Global Standard immunoassay platforms for precise and timely results.

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Why is the Vitamin B12 Active Test Done?

Early Deficiency Detection

Holo-TC detects early and functional Vitamin B12 deficiency before total B12 levels drop, making it the preferred test for:
  • Borderline B12 levels
  • Early neurological symptoms
  • Screening high-risk individuals
  • Identifying functional deficiency despite normal serum B12

Supporting Anemia Diagnosis

A low Vitamin B12 Active level helps diagnose:
  • Megaloblastic anemia
  • Pernicious anemia
  • Macrocytic anemia
  • Mixed nutritional deficiency
Doctors often combine Holo-TC testing with CBC, folate, and methylmalonic acid (MMA). Assessing Nerve and Metabolic Health Vitamin B12 is essential for:
  • Myelin (nerve sheath) formation
  • Memory and cognitive health
  • Energy metabolism
  • Red blood cell production
  • Low Holo-TC may explain symptoms even if total B12 appears normal.
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Who Should Get a Vitamin B12 Active Test?

Symptoms That Indicate Testing

You may need this test if you experience:
  • Tingling or numbness
  • Fatigue or weakness
  • Memory issues
  • Mood changes
  • Dizziness
  • Balance problems
  • Pale skin
  • Mouth ulcers

High-Risk Groups

You should consider regular vitamin B12 active testing if you are:
  • Vegetarian or vegan
  • Above age 50
  • Diabetic and on metformin
  • On antacids or PPIs
  • Recovering from gastric surgeries
  • Suffering from malabsorption disorders
  • Diagnosed with autoimmune conditions
  • Experiencing chronic fatigue or neuropathy
Monitoring Treatment Effectiveness
Doctors use this test to monitor:
  • Vitamin B12 injection therapy
  • Oral supplementation
  • Response to treatment in anemia or neuropathy
  • Long-term dietary deficiencies
 
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How to Read Vitamin B12 Active Test Results?

Normal Holo-Transcobalamin Values (Ranges vary by laboratory)
Level Category Reference Range
Normal > 50-70 pmol/L
Borderline 35-50 pmol/L
Low / Deficient < 35 pmol/L&

Low Holo-TC Levels May Indicate

  • Functional B12 deficiency
  • Malabsorption
  • Pernicious anemia
  • Chronic gastrointestinal disorders
  • Interference from medications (metformin, PPIs)
  • Early neurological deficiency
Your doctor may order additional tests like:
  • Methylmalonic acid (MMA)
  • Homocysteine
  • Folate levels
  • Intrinsic factor antibody

Factors Influencing Holo-TC Levels

Can reduce levels:
  • Vegetarian/vegan diets
  • Chronic alcohol intake
  • Malabsorption
  • Aging
  • Gastric surgery
Can increase levels:
  • Liver disease
  • Kidney disorders
  • Recent supplementation
Only a trained doctor can interpret clinical significance.
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What to Ask the Doctor

  • Is my low Holo-TC level causing my symptoms?
  • Should I take injections or oral supplements?
  • Is my deficiency reversible?
  • Do I need total B12, MMA, or homocysteine along with Holo-TC?
  • How often should I repeat the test?
  • Are my medications affecting Vitamin B12 absorption?
  • What diet changes should I follow?
How our test process works!
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STEP 01
Identity Verified at Every Step
Verified identity at every step to eliminate sample mix-ups
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STEP 02
Sterile, Barcoded Collection
Sterile, barcoded collection to maintain sample integrity
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STEP 03
Expert-Led Sample Collection
Trained professionals ensuring safe, accurate, and comfortable collection

FAQs To Help You Know Better

What is the Vitamin B12 Active (Holo-TC) test used for?
It detects early and functional Vitamin B12 deficiency more accurately than the regular B12 test.
Is the Holo-TC test better than a normal Vitamin B12 test?
Yes. Normal B12 measures total levels, while Holo-TC measures the active, usable form.
Do I need to fast?
No, fasting is not required.
What sample is needed?
A blood sample from a vein, collected in a serum/separator tube.
When will I get results?
Usually on the same day.
What symptoms suggest low active B12?
Tingling, numbness, fatigue, memory issues, dizziness, mood changes.
Can medications reduce B12 levels?
Yes, metformin, PPIs, and antacids can lower active B12.
Can vegetarians get Vitamin B12 deficiency?
Yes, since B12 is mostly found in animal-based foods.
Can I book the Vitamin B12 Active test online?
Yes, you can book it online with home sample collection.
How is Vitamin B12 deficiency treated?
Through supplements or injections, depending on severity-your doctor will guide you.
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