The human body requires a range of vitamins and nutrients to keep it in tip-top condition, keeping us working and living to the fullest each day.
Vitamins are needed in small amounts, which tend to be provided through a person's diet, reports the Liverpool Echo. However, there are instances where people can become deficient in certain vitamins.
Vitamin B12 is an essential vitamin for many body functions, such as keeping blood and nerve cells healthy. B12 also helps prevent anaemia, which can leave people feeling weak and tired.
READ MORE - Edinburgh given yellow weather warning as city braced for five day snow freeze
The common symptoms of a deficiency in vitamin B12 can include pins and needles, weight loss and fatigue. However, there are two warning signs of a lack of the vitamin that show up in your mouth.
A sore and red tongue, which is medically referred to as glossitis, could be a sign of a deficiency, in accordance with NHS guidance.
A person with glossitis sees their tongue change shape and colour, as it gets swollen, red and painful. That inflammation can also make the tongue look smooth, as the tiny bumps on the tongue that contain the taste buds stretch out and disappear.
Some people develop a vitamin B12 deficiency as a result of not getting enough vitamin B12 from their diet.
Ulcers in the mouth are also a potential symptom of the disease. Those who do not get enough B12 in their diet can also develop anaemia, which includes a symptom of reduced sense of taste.
A diet that includes fish, meat and dairy products tends to provide enough vitamin B12, but people who do not regularly consume these food can become deficient.
Vitamin B12 deficiency anaemia is usually treated with injections of vitamin B12. Those who think they aren't getting enough B12 should contact a doctor for more information.
READ NEXT
Edinburgh snow and ice weather warning extended as wintry weather to cause havoc
Lorraine brands Harry and Meghan issues a 'circus' following coronation invite
Laura Anderson drops 'major hint' about baby's gender as star shows off blossoming bump
Passport warning issued to Edinburgh holidaymakers travelling to Spain
Tesco recall popular sauce due to undeclared ingredients on label
