Vitamin B12 Deficiency: Common Signs and Symptoms

Check the full list of common signs & symptoms associated with the deficiency of Vitamin B12 here.

2 min read
Vitamin B12 Deficiency: Common Signs and Symptoms
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Vitamin B12 is an essential nutrient that our body requires for different functions, including production of energy, synthesis of DNA (Deoxy Nucleic Acid), proper functioning of the CNS (central nervous system) and so on. Despite the common presence of Vitamin B12 in different food sources, the deficiency of the vitamin has been found to be quite prevalent in many individuals. The are many reasons behind this, some of them are poor dietary intake of Vitamin B12, oral intake of Vitamin B12 depleting medicines, and malabsorption of the vitamin in the body.


According to some studies, it has been found that almost more than 20% of people from the United States and United Kingdom suffer from Vitamin B12 deficiency leading to different signs and symptoms. As an individual grows old, the capability to absorb vitamin B12 from the food decreases and that is why the deficiency is commonly found in older adults.

The deficiency of vitamin B12 is often misdiagnosed due to the lack of symptom specificity or unavailability of proper testing. Whatever the reason, the deficiency can lead to many signs and symptoms that might affect the health of the individuals drastically.


List of Common Signs and Symptoms of Vitamin B12 Deficiency

Following is the list of signs and symptoms that are commonly found in people who suffer from vitamin B12 deficiency:

  • Poor muscles.

  • Difficulty in walking

  • Common fatigue

  • Lack of concentration

  • Depressive symptoms

  • Lack of energy

  • Gastrointestinal (GIT) issues

  • Frequent weight loss

  • Mental impairment

  • Pain and inflammation of body parts especially in the mouth and tongue

  • Frequent headaches

  • Paresthesia (tingling or numb sensation in hands and feet)

  • Irritated nature

  • Lack of appetite

  • Pernicious anaemia

  • Tachycardia (fast heart rate)

  • Pale or yellow skin.

  • Smooth or tender tongue

The above signs and symptoms are mainly associated with the vitamin B12 deficiency and are commonly overlooked. Consult a doctor immediately if you feel any of these symptoms.

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Topics:  Vitamin B12 

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