People claim that this really works!
This type of whitening doesn’t have the same effects on every type of teeth, but if you have, for example, yellowish teeth, it should work and in case of grayish teeth, the whitening can be invisible.
There are numerous whitening toothpastes which contain smaller quantities of carbamide-peroxide e.g. small abrasive particles which clean our teeth mechanically and slide on our dental enamel.
However, you can also prepare your own natural whitening toothpaste!
Mix a little bit of baking soda with some toothpaste.
Take a piece of aluminum foil, then fold it in a strap with the width and length that matches your teeth.
Put the acquired toothpaste on the foil and put it on your teeth.
Hold the foil with the paste on your teeth for 1 hour. For a more visible effect, put the paste on a foil two times a day for 7 days.
This whitener can make even yellow teeth more beautiful and the effect of whitening should be seen in a couple of days or weeks, depending on the method you’re using.
There are no side-effects known until now, but dentists don’t recommend too much whitening, as it can destroy the dental enamel.