Put the bleach down. This is way easier
People, it's time to retire that extra-special whitening toothpaste of yours. Turns out the secret of a lovely pearly smile is a simple splash of milk in your morning brew.
Yes, it's true. A new study from the International Journal of Dental Hygiene has found that a touch of the creamy stuff in your tea can stop your gnashers from becoming stained.
The tannins from tea leaves found in your cup are dark, and can therefore cling and cause discolouration. Counteracting this is casein, the protein found in milk, which binds to the former to stop yellowing taking hold.
This was all discovered by Dr Ava Chow from the University of Alberta's School of Dentistry, the leader of the trial. With her team, she placed a group of human teeth in a tea solution, and another group in a tea solution with milk. After leaving the experiment for 24 hours at 37C, readings of the colours were taken again and, hey presto, the sans-dairy teeth were darker.
Of the findings, Dr Chow said: "The magnitude of the colour change observed in our experiments is comparable with the colour change seen by vital bleaching products and more effective than whitening toothpastes."
The upshot? Black tea is probably not the way to go.... But what about a latte?!