A Vitamin B6 (Pyridoxine) blood test measures the level of Vitamin B6 in your blood. Vitamin B6 is essential for various bodily functions, including amino acid metabolism, neurotransmitter synthesis, and haemoglobin production. Deficiency or excess of Vitamin B6 can lead to various health issues.

Why It’s Done

  • Diagnose Deficiency or Excess: Symptoms of deficiency include irritability, depression, confusion, and anaemia. Symptoms of excess include nerve damage and numbness.
  • Monitor Chronic Conditions: Conditions such as kidney disease, liver disease, and malabsorption syndromes.
  • Evaluate Nutritional Status: Particularly in individuals with poor diet, alcoholism, or malabsorption conditions.
  • Monitor Treatment: For patients receiving Vitamin B6 supplements or certain medications that affect Vitamin B6 levels.

Preparation

  • Fasting: Generally, fasting is not required unless specified by your healthcare provider.
  • Medications: Inform your healthcare provider about any medications or supplements you are taking, as some can affect Vitamin B6 levels.

Procedure

  1. Blood Sample Collection: A healthcare professional will draw a blood sample from a vein in your arm.
  2. Laboratory Analysis: The blood sample is sent to a lab where the level of Vitamin B6 is measured.

Normal Range

  • Serum Vitamin B6 Levels: Typically range from 5 to 50 micrograms per litre (mcg/L), but this can vary slightly depending on the laboratory.

Follow-Up

  • Abnormal Results: May require additional tests or changes in medication, diet, or lifestyle. Your healthcare provider will guide you on the necessary steps.
  • Regular Monitoring: Essential for individuals with ongoing conditions affecting Vitamin B6 levels, such as chronic kidney disease or those on medications that impact Vitamin B6 metabolism.

Factors Affecting Vitamin B6 Levels

  • Diet: Foods rich in Vitamin B6 include poultry, fish, potatoes, chickpeas, bananas, and fortified cereals.
  • Medications: Certain medications can interfere with Vitamin B6 metabolism or absorption, including some antibiotics, anticonvulsants, and medications for rheumatoid arthritis.
  • Medical Conditions: Conditions like kidney disease, liver disease, and celiac disease can alter Vitamin B6 levels.

Importance of Vitamin B6

  • Amino Acid Metabolism: Vital for the breakdown and utilization of proteins.
  • Neurotransmitter Synthesis: Involved in the production of serotonin, dopamine, and GABA, which are important for mood regulation and nervous system function.
  • Haemoglobin Production: Essential for the formation of haemoglobin, which carries oxygen in the blood.
  • Immune Function: Supports the immune system by aiding in the production of antibodies.

Consult your healthcare provider if you experience symptoms of abnormal Vitamin B6 levels or if you have a condition that could affect Vitamin B6 balance. Regular testing and proper management can help maintain optimal health.

Results – 5 days from Laboratory receiving sample