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Vitamins

Vitamin B12 Blood Test: Are Your Levels Optimal?

Vitamin B12 is considered essential for red blood cell formation, neurological function, and DNA synthesis. Deficiency may develop gradually and is sometimes associated with dietary patterns. Healthcare providers can help interpret your results.

Doctor's Assessment Included

Reference Ranges

See the value that applies to you:

Choose male or female — this range differs by sex.

Enter your age — this range changes with age.

This range also depends on context such as cycle phase or sample material; the highlighted rows apply to your group.

Male Your group
pmol/l
Low 145 Normal 569 High
Female Your group
pmol/l
Low 145 Normal 569 High

Reference ranges may vary between laboratories. When you order a test, a BIG-registered doctor assesses your personal results in context. For treatment decisions, discuss your results with your GP.

Check your own value

Vitamin B12: what this test measures

This test measures the total vitamin B12 level in your blood, expressed in pmol/l. It may help assess whether your body has adequate B12 for blood cell production and nervous system maintenance. Your healthcare provider can place results in clinical context.

Vitamin B12: why this value matters

Vitamin B12 is believed to be vital for healthy nerve cells, red blood cell formation, and DNA synthesis. Low levels may be associated with anaemia, fatigue, and neurological symptoms. Early detection through testing may help prevent long-term complications.

Vitamin B12: when is testing worthwhile?

Testing may be recommended when experiencing persistent fatigue, numbness or tingling, difficulty concentrating, or mood changes. Healthcare providers may also suggest testing for vegetarians, vegans, older adults, or those with gastrointestinal conditions affecting absorption.

Vitamin B12: symptoms of a high or low value

Low Levels

Some people with low vitamin B12 may experience fatigue, weakness, pale skin, numbness or tingling in extremities, and difficulty with balance. Mood changes and memory difficulties have also been reported. A healthcare provider can help identify the underlying cause.

High Levels

Elevated vitamin B12 levels may sometimes occur with supplementation or certain medical conditions. While generally considered less concerning than low levels, persistently high B12 may warrant investigation. Your healthcare provider can advise on appropriate follow-up.

Vitamin B12: what to do about an abnormal value

Male

If Low

Low B12 may cause fatigue, neurological symptoms, and anemia. Consider B12 supplementation (1000 mcg daily) or injections if severely deficient.

If High

High B12 is generally not concerning and may indicate recent supplementation. No action needed unless symptomatic.

Female

If Low

Low B12 may cause fatigue, neurological symptoms, and anemia. Consider B12 supplementation (1000 mcg daily) or injections if severely deficient.

If High

High B12 is generally not concerning and may indicate recent supplementation. No action needed unless symptomatic.

Vitamin B12: lifestyle and this value

Foods considered rich in B12 include meat, fish, eggs, and dairy products. Those following plant-based diets may benefit from fortified foods or supplements. Absorption may decrease with age, so regular monitoring could be helpful. Discuss options with your healthcare provider.

Vitamin B12: frequently asked questions

Who is most at risk for vitamin B12 deficiency?

People following vegetarian or vegan diets, older adults, and those with gastrointestinal conditions such as Crohn's disease or celiac disease may be at higher risk. Healthcare providers can help determine your individual risk and recommend appropriate monitoring.

Can vitamin B12 deficiency cause permanent damage?

Prolonged B12 deficiency may potentially lead to irreversible neurological damage in some cases. Early detection and treatment are generally considered important. If you suspect a deficiency, consult your healthcare provider promptly for evaluation and guidance.

How is vitamin B12 deficiency typically treated?

Treatment may include oral supplements, dietary changes, or in some cases injections, depending on the cause and severity. Your healthcare provider can recommend the most appropriate approach based on your individual circumstances and test results.

Test Products

This marker is included in the following test panels.

General checkup

General checkup

A broad blood test covering 18 values across liver, kidneys, thyroid, heart, vitamins and blood count.

ALT (Alanine Aminotransferase) GGT (Gamma-Glutamyl Transferase) Creatinine eGFR (Estimated Glomerular Filtration Rate) TSH (Thyroid Stimulating Hormone) Total Cholesterol HDL Cholesterol LDL Cholesterol Triglycerides Glucose (Fasting) Vitamin D (25-OH) Vitamin B12 Ferritin Hemoglobin Leukocytes (WBC) Platelets (Thrombocytes) CRP (C-Reactive Protein) MCV (Mean Corpuscular Volume)
€199,-

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Medical standards

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Medical policy
CIBG Ministerie van Volksgezondheid,
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Vitamin B12

€33,-