9 Symptoms of Vitamin B12 Deficiency You Should Never Ignore | April 9, 2025

Vitamin B12 is essential for nerve function, red blood cell production, and DNA synthesis, but many people suffer from a deficiency without realizing it. Since the body doesn’t naturally produce B12, we must get it from food or supplements. Deficiency can lead to serious health problems if left untreated. Here are nine warning signs your body might be lacking this crucial vitamin.

1. Persistent Fatigue and Weakness

Feeling constantly tired, sluggish, or weak despite getting enough rest? A lack of B12 can cause low oxygen levels in your blood, leading to persistent fatigue and reduced muscle strength. Learn more from Medical News Today.

2. Pale or Jaundiced Skin

A deficiency in vitamin B12 can result in pale or yellowish skin due to decreased red blood cell production, leading to a condition called megaloblastic anemia.

3. Tingling or Numbness in Hands and Feet

One of the most serious symptoms of B12 deficiency is nerve damage. If you experience pins and needles, tingling, or numbness in your extremities, it could be due to poor myelin production, which protects nerves and ensures proper function.

4. Balance and Coordination Issues

B12 plays a key role in the nervous system. Deficiency can affect movement and coordination, increasing the risk of falls, especially in older adults. See research from the National Institutes of Health.

5. Memory Problems and Brain Fog

Struggling with forgetfulness, confusion, or difficulty concentrating? Low B12 levels can impair cognitive function, sometimes mimicking early signs of dementia or Alzheimer’s disease. Read more from the Alzheimer’s Society.

6. Shortness of Breath and Dizziness

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