Vitamin B12 (Cyanocobalamin)
The test determines the blood vitamin B12 level — an important water-soluble vitamin necessary for hematopoiesis, nervous system function, and DNA synthesis. Vitamin B12 participates in erythrocyte formation, maintaining brain and peripheral nerve function, and amino acid and fatty acid metabolism.
Decreased vitamin B12 is possible with: insufficient dietary intake, absorption disorder in the stomach and intestines, autoimmune diseases (pernicious anemia), liver diseases, prolonged use of certain medications.
Elevation is possible with: liver diseases, oncological diseases, excessive B12 supplement intake.
Recommended for testing:
- people with anemia
- patients with neurological symptoms
- vegetarians and vegans
- elderly people
- patients with GI diseases
- with long-term use of medications affecting vitamin absorption
Biomaterial: Venous blood
- Submit fasting (8-12 hours without food)
- Avoid alcohol for 24 hours
- Avoid intense physical exertion
- Avoid smoking and stress 30 minutes before
- Anemia (especially megaloblastic)
- Chronic fatigue, weakness
- Dizziness, fainting
- Memory and concentration disorders
- Numbness, tingling in extremities
- Depression, irritability
- Stomach and intestinal diseases (gastritis, atrophic gastritis)
- After stomach surgeries
- Vegetarianism and veganism
- Suspected vitamin B12 deficiency
Decreased vitamin B12 — may indicate deficiency leading to anemia and neurological disorders
Elevated vitamin B12 — possible with liver diseases or excessive vitamin intake
