Vitamin B12 is also known as cobalamin. This means that our bodies cannot produce it and we must get it from food. It plays an important role in the production of DNA and red blood cells and also supports the nervous system. It is commonly found in fish, poultry, meat, milk, eggs, and fortified products. Unfortunately, vitamin B12 deficiency is still common, especially in the elderly population. Atrophic gastritis affects adults 10–30 years of age, causing them to be unable to absorb naturally occurring B12 from food. Adults with this condition, however, can absorb B12, which is usually added to strong forts. Vegetarians and strict vegetarians are also at risk of vitamin B12 deficiency because many food sources are animal-based.

Vitamin B12 deficiency can inhibit the synthesis of DNA during the production of red blood cells, which leads to a decrease in the number of red blood cells in a condition called megaloblastic anemia. This condition manifests itself in a number of symptoms that may not occur until years after the onset of B12 deficiency.

Deficiency  Symptoms of Vitamin B12 Are following under the below:

  1. Jaundice or mild skin

People with B12 deficiency often appear pale or have slight yellowing of the skin and whitening of the eyes, the result of jaundice. Doctors reported what they described as a rare case of a vegan teenager with jaundice caused by megaloblastic anemia whose symptoms were reversed with B12 treatment.

  1. Fatigue and weakness

B12 deficiency can affect your body’s ability to make the right amount of red blood cells. Without red blood cells to carry oxygen throughout your body, you may feel weak and tired.

  1. The feeling of “pins and needles”

Nerve damage, more serious side effects, can result in long-term failure of B12. This is because B12 plays an important role in the production of myelin, a substance that conducts and protects the nerves. A common symptom of nerve damage due to vitamin B12 deficiency is the sensation of “pins and needles”.

  1. Dynamic changes

If left untreated, damage to your nervous system caused by low B12 can affect your ability to walk and walk.

  1. Glossitis

One of the early symptoms of vitamin B12 deficiency is glossitis, a swollen, red tongue.

  1. Shortness of breath and dizziness

Anemia as a result of B12 deficiency Some people experience dizziness and shortness of breath. This is because the body is unable to provide adequate oxygen to all its cells with its deficiency.

  1. Blurred vision

Vitamin B12 deficiency can cause disturbed or blurred vision in some people.

  1. Behavior or mood changes

People with vitamin B12 deficiency have reported significant and sudden changes in their mood.

  1. High temperature

Deficiency of B12 can lead to an increase in high body temperature, although this is a rare symptom.