Why three cuppas a day keeps the dentist away: Black tea 'combats bacteria linked with tooth decay and gum disease'



Researchers have claimed that drinking at least three cups of tea a day can help keep your teeth in good condition, reducing the risk of decay

A comforting cup of tea brings a smile to most people’s faces.



And now, according to scientists, it might make that smile just a little bit brighter.

Researchers have claimed that drinking at least three cups of tea a day can help keep your teeth in good condition, reducing the risk of decay.

A review of existing studies found that black tea helped combat two types of bacteria – Streptococcus mutans and Lactobacillus – that are both associated with tooth decay and gum disease.

The most effective ‘dose’ of tea was three to four cups a day, according to study leader Dr Carrie Ruxton.

And scientists found that black tea continued to fight decay, even if it had some sugar added to it.



Green tea appeared to have a similar effect – and also helped prevent bad breath by neutralising sulphur compounds that contribute to the condition.

Dr Ruxton, whose review is published in the British Nutrition Foundation’s Nutrition Bulletin, said there was good evidence that tea drinking protects against tooth loss.

‘Evidence specific to black tea suggests that three to four cups a day could help to reduce levels of bacteria in the mouth,’ she said.

‘I’m sure this news is set to be welcomed by dentists and hygienists alike as they continue to educate the nation on the need for greater oral care.’

She said when bacteria in the mouth reacts to carbohydrates, it produces acid that dissolves tooth enamel, resulting in damage that leads to fillings or tooth loss.

Black and green teas appear to reduce inflammation and prevent the adhesion and growth of bacteria that start the chain reaction, she said.

Tea contains antioxidant ingredients known as flavonoids and catechins, tannin-type substances, that have an anti-microbial effect.

The review also shows green tea could aid weight loss, by boosting energy expenditure and burning up more fat.

Scientists found that black tea continued to fight decay, even if it had some sugar added to it

Regular consumption increases energy expenditure by four to five per cent, while fat oxidation - the elimination of fat that would otherwise be stored - goes up by 10 to 16 per cent.

Dr Tim Bond, spokesman for the industry-backed Tea Advisory Panel, said ‘A relatively little known benefit of tea until recently has been its potential for reducing the risk of dental caries.

'This benefit is thought to be due to a reduction in inflammation in the oral cavity and prevention of the adhesion and growth of bacteria linked to periodontal disease.

‘In terms of weight management, Dr Ruxton’s published review found further supporting effects for green tea when consumed by overweight and obese adults.

‘How green tea might contribute to weight management needs further research, but this latest research review suggests that the catechin ingredients could impact on satiety and thermogenesis and may counter the reductions in metabolism seen when body weight falls.

‘This latest research review already adds to the many health benefits associated with the humble cup of tea including heart health benefits and links with reduced risk of cancers.

