Vitamin B12 deficiency can develop gradually, and some symptoms are easy to overlook. B12 is important for red blood cell production, nerve function, and DNA formation. If a deficiency is left untreated for a long time, some nerve problems may become difficult to reverse.
Common signs of vitamin B12 deficiency
- Unusual tiredness or weakness
- Pale skin or signs of anemia
- Tingling, numbness, or “pins and needles” in the hands or feet
- Balance problems or difficulty walking
- Memory problems, confusion, or trouble concentrating
- Mood changes such as irritability or low mood
- Sore, red, or swollen tongue
- Reduced appetite
- Shortness of breath or dizziness (often related to anemia)
Who is more at risk?
- Older adults
- People with low intake of animal products (such as vegans, unless they use fortified foods or supplements)
- People taking metformin for diabetes
- People using long-term acid-reducing medicines
- People with conditions affecting absorption, such as certain stomach or intestinal disorders
What to do
A blood test can check B12 levels and related markers if deficiency is suspected. Treatment may involve dietary changes or supplements, depending on the cause and severity.
Seek medical advice if you have new numbness, weakness, balance problems, confusion, or significant fatigue, especially if symptoms are worsening.
If you share your age, symptoms, diet (for example vegetarian or not), and any medicines you take, I can help you understand whether B12 deficiency is a possibility.
