Most of us understand that our bodies require a variety of vitamins and nutrients to function optimally. We typically obtain these essential vitamins from our diet, but occasionally, deficiencies can occur, necessitating a boost in certain nutrients.

Vitamin B12 plays a crucial role in several bodily functions. Besides maintaining the health of your blood and nerve cells, it also helps ward off anaemia, which can leave individuals feeling fatigued and weak. Common indicators of a vitamin B12 deficiency include tiredness, a sensation of pins and needles, and weight loss.

However, two symptoms that manifest in your mouth could also hint at a lack of this vital vitamin.

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According to NHS guidelines, a sore and red tongue, medically known as glossitis, could signal a deficiency. Glossitis alters the colour and shape of the tongue, causing it to become painful, red, and swollen, reports the Liverpool Echo.

The inflammation also gives the tongue a smooth appearance, as the tiny bumps that house the taste buds stretch out and vanish. Mouth ulcers are another potential symptom.

Insufficient intake of B12 can lead to anaemia, another symptom of which is a diminished sense of taste. Some individuals develop a vitamin B12 deficiency due to inadequate dietary intake of the vitamin.

A diet rich in meat, fish and dairy products typically provides sufficient vitamin B12. However, those who don't consume these foods regularly may risk a deficiency.

Vitamin B12 deficiency anaemia is commonly treated with vitamin B12 injections. If you're concerned about not getting enough B12, it's advisable to consult your GP, who can organise a blood test to assess your levels.