Symptomer på B12-vitaminmangel

Symptoms of vitamin B12 deficiency: What should you pay attention to?

Vitamin B12 is essential for the health of the body, especially for the nervous system, red blood cell production and DNA synthesis. A deficiency can cause a number of serious symptoms that can worsen over time if left untreated.

The most common symptoms of vitamin B12 deficiency:

  1. Fatigue and weakness

B12 deficiency can lead to decreased energy production in the body, resulting in fatigue even when you've had enough rest. You may also feel weak and have difficulty carrying out daily activities.

  1. Shortness of breath and dizziness

Low B12 levels can lead to anemia, a condition in which the body does not produce enough red blood cells. This can result in shortness of breath and dizziness, especially during physical activity.

  1. Pale skin

Since B12 plays an important role in the formation of red blood cells, a deficiency can cause the skin to take on a pale or yellowish tinge, known as jaundice.

  1. Nerve problems

Long-term B12 deficiency can damage the nervous system, resulting in symptoms such as tingling and prickling in the hands and feet, known as peripheral neuropathy. This can be one of the more serious side effects of an untreated B12 deficiency.

  1. Mood swings and depression

B12 plays an important role in brain health. A deficiency in B12 can therefore lead to mood swings, depression and cognitive problems such as memory problems and difficulty concentrating.

  1. Mouth problems

Red and sore tongues, mouth ulcers and a burning sensation in the mouth or tongue are some of the symptoms that can occur with B12 deficiency.

How is B12 deficiency diagnosed?

At Valida Health, we can help identify B12 deficiency through a simple blood test. Our advanced blood tests analyze vitamin and mineral levels to give you a complete overview of your body's health status. If you are experiencing any of the above symptoms, a B12 test may be relevant for you.


The blood test can be performed in the clinic and results are available within 2-3 days. Our healthcare professionals are ready to review the results with you and ensure that you receive the necessary treatment to restore your B12 levels and improve your health.