Vitamin B12 deficiency can develop slowly, so its symptoms are sometimes overlooked or attributed to aging, stress, or other conditions. Recognizing the signs early is important because prolonged deficiency can lead to permanent nerve damage in some cases.
Common signs and symptoms include:
- Persistent fatigue or weakness
- Feeling unusually tired even after adequate rest.
- Numbness or tingling
- “Pins and needles” in the hands or feet due to nerve involvement.
- Problems with balance or walking
- Feeling unsteady or having difficulty coordinating movements.
- Memory or concentration difficulties
- Forgetfulness, confusion, or trouble focusing.
- Pale or slightly yellow skin
- This can occur if the deficiency causes anemia.
- A sore, smooth, or red tongue
- Sometimes accompanied by mouth ulcers.
- Shortness of breath or dizziness
- Especially during physical activity if anemia is present.
- Mood changes
- Depression, irritability, or other changes in mood.
Who is at higher risk?
- Older adults
- People following a strict vegan diet without B12 supplements or fortified foods
- People with conditions that reduce B12 absorption (such as pernicious anemia or certain digestive disorders)
- Those who have had stomach or intestinal surgery
- People taking certain medications, such as metformin or long-term acid-reducing medications
Diagnosis and treatment
A vitamin B12 deficiency cannot be diagnosed based on symptoms alone. A healthcare professional can confirm it with blood tests. If a deficiency is found, treatment may include oral supplements or vitamin B12 injections, depending on the cause and severity.
If you have symptoms such as persistent numbness, difficulty walking, or significant memory changes, it’s important to seek medical evaluation promptly rather than relying solely on over-the-counter supplements.
