Vitamin B12 deficiency can develop gradually, but some of its earliest warning signs may show up in unexpected parts of the body—including the feet. Also known as cobalamin, vitamin B12 is essential for healthy nerves, red blood cell production and DNA formation.
When the body does not receive or absorb enough of this important nutrient, deficiency can affect the nervous system, blood cells and overall energy levels. In some people, symptoms involving the feet may be among the first noticeable clues.
How Can Vitamin B12 Deficiency Affect Your Feet?
One of the common nerve-related symptoms associated with vitamin B12 deficiency is a tingling or “pins and needles” sensation in the feet.
Some people may also experience numbness, reduced sensation or problems with balance. As nerve damage progresses, walking can become difficult and a person may feel unsteady or stagger while moving.
Vitamin B12 is also important for the production of healthy red blood cells. A deficiency can contribute to anaemia, which may reduce the amount of oxygen delivered throughout the body. This can contribute to weakness and other symptoms.
If you develop persistent tingling, numbness, balance problems or unusual sensations in your feet, it is important to consult a doctor rather than assuming the symptoms are simply due to fatigue or poor circulation.
Other Symptoms of Vitamin B12 Deficiency
B12 deficiency does not necessarily affect only the feet. Symptoms can develop slowly and become more noticeable over time.
Physical Symptoms
Possible signs include:
- Persistent tiredness or weakness
- Reduced appetite
- Unintentional weight loss
- Nausea, vomiting or diarrhoea
- A sore or painful mouth
- Pale-looking skin
Neurological Symptoms
As vitamin B12 is important for normal nerve function, deficiency can also cause:
- Vision problems
- Memory difficulties
- Confusion
- Problems with normal walking
- Difficulty speaking normally
- Numbness or altered sensations
Psychological Symptoms
Some people may experience changes in mood or behaviour, including:
- Depression
- Anxiety
- Irritability
- Changes in mood or personality
Neurological problems caused by B12 deficiency can become serious if they remain untreated. Anyone experiencing persistent or worsening symptoms should seek medical evaluation.
What Causes Vitamin B12 Deficiency?
Vitamin B12 deficiency generally develops for one of two reasons: not consuming enough B12 or being unable to properly absorb the vitamin from food.
Several factors can increase the risk.
1. Not Getting Enough B12 Through Diet
People who consume very few foods containing vitamin B12, particularly when they do not use fortified foods, may be at greater risk of deficiency.
2. Stomach Inflammation
Conditions such as gastritis can interfere with the stomach’s ability to produce the substances needed for normal B12 absorption. Reduced stomach acid can also affect the process.
3. Pernicious Anaemia
Pernicious anaemia is an autoimmune condition that can prevent the body from absorbing vitamin B12 properly, potentially resulting in deficiency.
4. Digestive Disorders
Conditions affecting the digestive tract, including Crohn’s disease and coeliac disease, can interfere with the absorption of vitamin B12 from food.
5. Gastrointestinal Surgery
People who have undergone certain gastrointestinal procedures, including gastric bypass surgery, may have difficulty absorbing sufficient amounts of vitamin B12 afterward.
When Should You See a Doctor?
Persistent tingling, numbness, balance difficulties or changes in sensation should not be ignored, particularly when they occur alongside unexplained fatigue, weakness or other symptoms of B12 deficiency.
A healthcare professional can evaluate the symptoms and may recommend blood tests to determine whether vitamin B12 deficiency or another underlying condition is responsible. Treatment depends on the cause and severity and may involve dietary changes, oral supplements or, in some cases, vitamin B12 injections.
Important: Tingling or numb feet can have many causes, including diabetes, nerve compression and other neurological conditions. It is therefore important not to self-diagnose B12 deficiency based on a single symptom.