Vitamin B12 deficiency: Low level symptoms could show up on your face – what to spot

Smooth tongue

According to the National Heart, Lung and Blood Institute (NHLB), a smooth tongue can be a sign of vitamin B12 deficiency.

A smooth tongue is a sign of glossitis, which can be triggered by a lack of the vitamin.

Glossitis is a medical term used to describe an inflamed tongue, and alongside a smooth and shiny appearance the condition is characterised by a sore and reddened tongue.

It is important to note that glossitis can also be caused by a bacterial, viral or fungal infection.

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