Vitamin B12


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Quest Diagnostics Test Code: 927

Determining the level of Vitamin B12 in the blood is important because its deficiency can cause serious health issues. The human body can’t produce B12, so the diet is its only source

Vitamin B12 is part of the group of B vitamins which are water-soluble. Vitamin B12 is important for the maintenance of healthy brain and nerve function and production of red blood cells. Vitamin B12 is mostly found in meats, but can be supplemented into the diet. Vitamin B12 is one of the main components in the synthesis of fatty acids and energy production. In combination with folic acid, vitamin B12 is needed for the proper production and division of red blood cells. Low levels of vitamin B12 can result in the development of peripheral neuropathy and macrocytic anaemia. This deficiency is common in people suffering with malabsorptive disorders.

This test is performed in following conditions such as:

• Dizziness Pale skin
• Fatigue, muscle weakness
• Rapid heart rate, irregular heartbeats
• Shortness of breath
• Sore tongue and mouth
• Tingling, numbness, and/or burning in the feet, hands, arms, and legs

Also Known As: Cobalamin


Specimen Collected
  • Blood
Estimated Time Taken

Turnaround time for the Vitamin B12 test is typically 1 business day.