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6 signs of Vitamin B12 deficiency and how to address it in one month

TOI Lifestyle Desk
| ETimes.in | Last updated on - Jun 15, 2025, 08:20 IST
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6 signs of Vitamin B12 deficiency and how to address it in one month

Vitamin B12 is a crucial nutrient required to keep your cells and blood cells healthy. It also helps the body make DNA, the genetic material in all of the cells. As the body doesn't make vitamin B12 on its own, you have to add it to your diet or take supplements in order to get it. Despite its crucial role in the body, vitamin B12 is often overlooked until deficiency symptoms arise. Low levels can lead to serious health issues if untreated. Here are six common signs of Vitamin B12 deficiency and how to restore it to optimal levels.

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Persistent fatigue

Feeling unusually tired or weak, even after rest, is a crucial sign of B12 deficiency. Vitamin B12 is essential for red blood cell production, which carries oxygen throughout the body. But when there is insufficient oxygen delivery, it can leave you drained.

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Pale skin

A lack of healthy red blood cells can lead to pale skin or a slight yellowing (jaundice). A deficiency in B12 may cause megaloblastic anemia, where red blood cells are abnormally large and dysfunctional, impacting skin tone.

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Tingling or numbness

If you experience a tingling sensation or numbness in your hands or feet, testing your B12 levels could be helpful. A pins-and-needles sensation may indicate nerve damage from low B12 levels. This vitamin supports the myelin sheath, which insulates nerves. Without it, nerve signals can misfire, causing discomfort.

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Sore mouth and tongue

Another sign of vitamin B12 deficiency is a sore mouth and tongue. Glossitis, or inflammation of the tongue, can make it red, swollen, or sore. Some experience a burning sensation or mouth ulcers. These oral symptoms often appear early in B12 deficiency.

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Mood changes

Vitamin B12 deficiency also leads to irritability, depression, or anxiety. This vitamin influences serotonin and dopamine production, the neurotransmitters that regulate mood. Low levels may disrupt these pathways and affect mental health.

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Brain fog

Vitamin B12 deficiency also affects cognitive function. This may lead to memory lapses, difficulty concentrating, or brain fog. You may also experience a hard time remembering things or getting confused easily. In severe cases, it may mimic dementia-like symptoms, particularly in older adults, as B12 supports brain health and cognitive function.

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How to address vitamin B12 deficiency in a month

  • First things first. Consult a doctor and schedule a blood test to confirm B12 deficiency.

  • Incorporate B12-rich foods like salmon (4.8 mcg per 3 oz), beef liver (70.7 mcg per 3 oz), eggs (0.6 mcg per large egg), or fortified cereals. Vegans can opt for fortified plant milks or nutritional yeast.

  • Track improvements in energy, mood, or neurological symptoms. Continue supplements or injections as prescribed. Avoid alcohol and smoking, which can hinder absorption.

  • Maintain a B12-rich diet or continue supplements if at risk. Regular checkups can catch deficiencies early.


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Take care of these

Make sure you eat healthy to prevent a B12 deficiency

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Take care of these

It is important to take care of your health

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Take note

Take note of these things and keep yourselves healthy

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What is the role of vitamin B12?

Vitamin B12 plays a crucial role in several essential bodily functions, primarily supporting the healthy formation of red blood cells, ensuring proper nerve function, and aiding in DNA synthesis. It acts as a vital cofactor in cell metabolism and helps in the breakdown of homocysteine, an amino acid that, in high levels, can increase the risk of cardiovascular disease.(Image: Canva)

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Consult a doctor

It is important to talk to your doctor before taking any supplements.

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