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Vitamin B12 is necessary for the production of red blood cells and for the production of DNA. It stimulates the nervous system while keeping it healthy, the NHS added. It can be difficult to know if you are at risk of vitamin B12 deficiency as the symptoms evolve slowly. You may be at risk of vitamin B12 deficiency if you often develop needlesticks and stings, it was revealed.
Pins and needles in the hands or feet can be caused by nerve damage due to vitamin B12 deficiency.
Without enough vitamin B12, the nerves do not have a protective layer, which increases the risk of feeling, also called paresthesia.
"Unfortunately, the symptoms of a vitamin B12 deficiency can take years to manifest and the diagnosis can be complex," wrote dietitian Helen West on the Healthline Medical website.
"One of the most serious side effects of prolonged vitamin B12 deficiency is nerve damage.
"That being said, pin and needle sensations are a common symptom that can have many causes, so this symptom alone is not usually a sign of B12 deficiency."
You may also be at risk of deficiency if you frequently develop mouth ulcers, she added.
A number of hidden symptoms of vitamin B12 deficiency develop in the mouth, including ulcers and a burning sensation to the tongue.
This can even cause inflammation of the tongue and a smoother appearance than normal.
The inflammation can be very painful and can change the way you talk.
One of the most common signs of vitamin B12 deficiency is extreme fatigue.
Vitamin B12 is needed to make red blood cells and, without enough vitamin, the body is struggling to carry enough oxygen in the muscles.
Meanwhile, some patients may find that deficiency causes changes in their overall movements.
Changes in the nervous system can affect your balance and coordination, said the dietitian.
If you are concerned about the symptoms of vitamin B12 deficiency, consult a doctor.
Early diagnosis of the disease is crucial because it can lead to heart problems and temporary infertility on rare occasions.
But you can add vitamin by eating certain foods. Beef, liver, dairy products, eggs and salmon are the best sources of vitamin B12.
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