If you leave the stain too long it can get absorbed into the teeth, which is when the colour ... including blocking off saliva, which can deactivatee the effects of hydrogen peroxide.

“They all go in the category of depositing stains on the outside of your teeth,” which, she helpfully clarifies, can be lifted off just by brushing your teeth—if you get to it soon enoug ...

Baking soda is known for its teeth-whitening properties. It forms a potent paste that can help remove surface stains ...

Dr Ben Hargreave, the principal dentist at the Sydney-based Dental Boutique, shared the common ways people damage their teeth and how to avoid them.