If I brush my teeth twice a day and always use extra whitening toothpaste then why aren’t my teeth super white?
Whitening toothpaste doesn’t really work, and also teeth aren’t naturally like bright shiny white.
Tooth enamel covers the dentin of your teeth. If you consume a lot of acidic things, the enamel wears away, never to return. In other words, an unhealthy tooth, even with multitudes of whitenings, will start to look more ‘transparent’ than white.
Over-the-counter toothpastes can only whiten your teeth a little. The stuff you need to do to your teeth to really whiten them is not suitable for home use.
Because that “extra whitening” is mostly just marketing.
Like the whole white teeth thing.
Because “Whitening” is more marketing than science and because a natural, healthy tooth color is not brilliant white, its a bit off white more like an eggshell or ivory.
A lot of the ultra-whites you see on celebrities, influencers and such involve whitening treatments or porcelain veneers.
There are also staining habits, like coffee, which could play in but “super white” isn’t really natural.