Vitamin B12 is needed by the body to make red blood cells, and to help with the production of DNA. It boosts the nervous system while keeping it healthy, adding the NHS. It may be difficult to know if you are at risk of vitamin B12 deficiency, as these symptoms develop slowly. You may be at risk of vitamin B12 deficiency if you often develop pins and needles, it has been revealed.
Hand and foot pins and needles can be caused by nerve damage linked to deficiency in B12.
Without enough vitamin B12, the nerves do not have a protective layer, which increases the risk of sensation, which is also known as peresthesia.
"Unfortunately, vitamin B12 deficiency symptoms can take years to show up, and diagnosing it can be complex," Dieter Helen West wrote on medical website health.
"One of the more serious side effects of long-term B12 deficiency is nerve damage.
"Which, sensations of pins and needles are a common symptom that can have many reasons, so this symptom alone is not a sign of B12 deficiency."
You can also be at risk of deficiency if you frequently develop oral ulcers, she added.
There are a number of hidden B12 deficiency symptoms that develop in your mouth, including ulcers and tongue burning.
It may even cause your tongue to be inflamed and appear smoother than normal.
The inflammation can be very painful, and it can change the way you talk.
One of the most common signs of vitamin B12 deficiency is extreme drowsiness.
B12 is needed to make red blood cells, and without enough vitamin, the body struggles to deliver enough oxygen to your muscles.
Meanwhile, some patients may find the deficiency of the changes to their overall movement.
Changes to the nervous system could affect your weight and co-ordination, the dietician said.
You should talk to a doctor if you have any symptoms of vitamin B12 deficiency.
Early diagnosis is critical as it can lead to heart conditions and temporary infertility on rare occasions.
But you can top up on the vitamin by eating certain foods. The best sources of vitamin B12 include beef, liver, dairy foods, eggs and salmon.