26 Apr, 2024 @ 15:07
1 min read

How the colour of your tongue can warn you of cancer or diabetes, according to Harvard scientists

tongue

HARVARD scientists have revealed how the colour of your tongue can be an early sign of cancer and diabetes. 

Many people don’t know this, but your tongue can reveal much about your health. 

From the colour to the texture, the appearance of your tongue can give clues to what’s going on in your body. 

Now, an article published by Harvard University has confirmed this, saying it should have a round and symmetrical look. 

Photo by Alex Mihai C on Unsplash

“Generally it is a light pink colour, although some may have a purple or brown pigmentation in African, Asian and Mediterranean populations.”  

They also highlighted that the tongue can have white layer. 

According to Tien Jiang, Odontologist at the Department of Public Oral Health and Epidemiology at the Harvard Medical Dentistry school: “this comes from a resistant protein called keratin which helps us not to scratch it when we eat.” 

Sometimes, the colour of our tongue is affected by our diet. 

This is because the papillae (bumps on the tongue which help grip food and contain taste buds) on its surface can absorb colours and residue from food and drink. 

Curries with a lot of turmeric can stain the tongue yellow, while some sweets are known for leaving us with a striking blue mouth. 

But, these effects are temporary and pass within a few minutes. 

So, what colours should we be concerned about? 

READ MORE: These fruits and vegetables carry the most traces of pesticides in Spain – here’s how to remove them

Brown or black 

“A brown or black tongue indicates a condition called ‘black hairy tongue’ which occurs when the papillae become too large.

“Normally, these small bumps don’t have much room to grow, but if they do, they can trap bacteria and mixtures of coloured food, leaving a brown or black tint.” 

The condition is provoked by antibiotics, smoking, mouth dryness, excessive coffee or tea drinking and bad oral hygiene. 

White stains or sores

This is a sign you have a yeast overgrowth in the mouth. 

It can be provoked by illnesses such as diabetes or AIDS, antibiotics, cancer treatment, using dentures, smoking, mouth dryness and the use of inhalers. 

In extreme cases, they can be a sign of mouth cancer. 

If they become yellow, red and painful, they may also be a sign of cancer or canker sores. 

Bright red

This alarming condition could be a sign you have a B12 deficiency, scarlet fever or strep throat. 

The latter two conditions will be accompanied by a red rash. 

READ MORE: WHO says adults should eat at least 400 gm of fruits and vegetables per day 

Yzabelle Bostyn

Yzabelle Bostyn is an NCTJ trained journalist who started her journalistic career at the Olive Press in 2023.
Before moving to Spain, she studied for a BA in English Literature and Hispanic Studies at the University of Sheffield.
After graduating she moved to the university’s journalism department, one of the best in the UK.
Throughout the past few years, she has taken on many roles including social media marketing, copywriting and radio presenting.
She then took a year out to travel Latin America, scaling volcanoes in Guatemala and swimming with sharks in Belize.
Then, she came to the Olive Press last year where she has honed her travel writing skills and reported on many fantastic experiences such as the Al Andalus luxury train.
She has also undertaken many investigations, looking into complex issues like Spain’s rental crisis and rising cancer rates.
Always willing to help, she has exposed many frauds and scams, working alongside victims to achieve justice.
She is most proud of her work on Nolotil, a drug linked to the deaths of many Brits in Spain.
A campaign launched by Yzabelle has received considerable support and her coverage has been by the UK and Spanish media alike.
Her writing has featured on many UK news outlets from the Sun to the Mail Online, who contracted her to report for them in Tenerife on growing tourism issues.
Recently, she has appeared on Times Radio covering deadly flooding in Valencia.

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