Dr Rana Al-Falaki told Mirror that you should brush your teeth before breakfast.

"The answer we give patients is to brush before breakfast - and it's the answer many don't expect."

"As a dentist, this is actually one of the most commonly asked questions," Dr Al-Falaki said.

"The answer we give patients is to brush before breakfast. Otherwise, all the bacteria in your mouth that has built up overnight get to indulge in a feast on everything you eat or drink, and if you have fruit juice in the morning, brushing straight after is a big problem.

"In addition, brushing your teeth after is more likely to make your breath smell worse than if you brush pre-breakfast."

Dr Al-Falaki added that you should not use mouthwash straight after brushing your teeth as it washes away all the fluoride from your toothpaste.

"It's best practice not to use mouthwash straight after brushing your teeth, but to let the fluoride and other benefits of the toothpaste remain on your teeth and do its job."

But if brushing your teeth before breakfast sounds like an unpleasant idea, you should wait at least 30 minutes after eating so the acid from your meal does not weaken your enamel.