Brits have been advised on some of the more unusual things that can stain teeth.
WCBS reported that Dr Connelly claimed cough syrup and chlorine from swimming pools can be particularly harmful to the teeth if they are not quickly washed away.
He stated that swimmers calculus is a particular problem, as this occurs when chlorine the water reacts with the tooth enamel causing a yellowing of teeth and dark stain discolouration.
“Lemonade, there’s some lemonade that’s made from straight lemons and sugars,” he said.
“There’s nothing worse for your teeth – straight acid and sugar.”
Elsewhere, C Health recently reported that many people falsely assume that stained teeth come about as a result of poor oral health and this is not always the case.
Indeed, the publication stated that smoking, bad diets and drinking large amounts of coffee or red wine are all high-risk behaviours for teeth staining.