7 Signs of Vitamin B12 Deficiency

Oct 27, 2023, 05:40 PM IST

7 Signs of Vitamin B12 Deficiency

Kirtika Katira

Vitamin B12 is crucial for your body, playing a vital role in DNA synthesis, energy production, and the proper functioning of central nervous system.

Despite its presence in various foods, B12 insufficiency and deficiency are quite common. Here are some noticeable symptoms of  B12 deficiency.


One of the most common early signs is fatigue and weakness. Lack of vitamin B12 can lead to a reduction in red blood cell production, which means less oxygen is transported to your body's cells, resulting in fatigue.

Pale or Jaundiced Skin

A deficiency in vitamin B12 can cause a reduction in red blood cell production, leading to pale or jaundiced (yellowish) skin, as well as a general feeling of weakness.

Tingling and Numbness

B12 deficiency can cause nerve damage, leading to tingling and numbness in the hands and feet. This is often an early neurological symptom.

Difficulty Walking

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Cognitive Impairment

Vitamin B12 is essential for brain health, and a deficiency can lead to cognitive issues such as memory problems, difficulty concentrating, and mood changes.


A deficiency in B12 can result in a type of anaemia called megaloblastic anaemia. This occurs when the body produces larger, less functional red blood cells.

Gastrointestinal Symptoms

B12 absorption occurs in the stomach, and certain conditions that affect the stomach or intestines can lead to a deficiency. Gastrointestinal symptoms can include diarrhoea, constipation, or loss of appetite.