Some of the most recognisable warning signs can show up on your tongue.
According to National, Heart, Lung, and Blood Institute (NHLB), a smooth, thick, red tongue is a sign of vitamin B12 deficiency.
Other symptoms of vitamin B12 deficiency involve the digestive tract.
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As the NHLB explains, these symptoms include nausea (feeling sick to your stomach) and vomiting, heartburn, abdominal bloating and gas, constipation or diarrhoea, loss of appetite, and weight loss.
READ MORE: Eight telltale signs you have low vitamin B12 levels – what to look for
Source: Daily Express
