A dentist explains how the way you've been "whitening" your teeth is just wrong.
Once upon a time this reporter had a partner who told him "Love your teeth, nice and yellow".
If only the advice of this dentist had been more widely known! A relationship could have been saved.
As Dr Ada Cooper explains, "whitening" toothpastes don't change a tooth's colour it just paints over it.
The over the counter style whiteners contain "abrasives" that remove surface stains, such as coffee or food, or that Chipotle you had three days ago.
To really whiten a tooth, doctor Cooper claims only something that contains a form of peroxide will do the trick.
Obviously not the same form of peroxide as your 2002 Christina Aguilera phase.
Dr Cooper details how this can be done at your dentist's office, or at home.
She also provides this caution.
It's important to remember that unless your teeth are healthy it doesn't really matter how white they are.
Check out the video, from Business Insider below: