Diagnostic tests

Vitamin B12 blood test

A Vitamin B12 blood test measures the levels of vitamin B12 in the blood. Vitamin B12 is a nutrient that is important for the proper functioning of the brain and nervous system, the production of red blood cells, and the metabolism of carbohydrates and fats. It is found in animal-derived foods, such as meat, poultry, fish, eggs, and dairy products, and is also available as a dietary supplement.

The results of a Vitamin B12 blood test can help a healthcare provider diagnose and monitor conditions related to vitamin B12 levels, such as vitamin B12 deficiency or excess, liver problems, and malnutrition. The test can also be used to monitor the effectiveness of vitamin B12 supplementation. Vitamin B12 deficiency can cause a wide range of symptoms, including fatigue, weakness, anemia, nerve problems, and cognitive difficulties.

This page is provided for educational and informational purposes only and does not constitute the provision of medical advice or professional services. The information provided should not be used for diagnosing or treating a health problem or disease, and those seeking personal medical advice regarding any of the tests and conditions referenced above are advised to consult with a licensed clinician. Always seek the advice of your qualified health provider regarding a medical condition and do not disregard professional medical advice or delay in seeking it because of any information on this page. If you think you may have a medical emergency, immediately call 911 or go to the nearest urgent care center or hospital.

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