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Common Signs Your Body Is Low On Vitamin B12
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Common Signs Your Body Is Low On Vitamin B12

  • unbranded - Lifestyle
  • Feb 25, 2026
  • Feb 25, 2026 Updated Mar 4, 2026
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Vitamin B12 plays a vital role in energy production, and research suggests it may also help ease symptoms of depression and reduce the risk of dementia. Symptoms of vitamin B12 deficiency vary greatly from mild fatigue to severe neurological issues.  Those with a mild deficiency may feel fatigued, while those with a moderate deficiency could develop anemia.  Anemia can cause vitamin B12 deficiency, which leads to cracks or sores around the mouth.  A moderate deficiency in this important nutrient could also cause peripheral neuropathy.  Experts say that a serious deficiency in vitamin B12 may also cause serious neurological and psychiatric issues.  This includes irritability, impaired cognition, depression, psychosis, and dementia.  The people most at risk of developing a vitamin B12 deficiency are those who do not consume many animal products.

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