Wat kun je van whitening tandpasta verwachten?

What to expect from whitening toothpaste?

To assess the whitening effect of whitening toothpastes, their ingredients
were studied. These toothpastes turned out to have an influence
particularly on the extrinsic discoloration of teeth caused by staining. To
a large extent, the effectiveness of the whitening toothpastes relies on
removing these extrinsic stains, preventing new stains from developing
and on certain optical effects. The intrinsic colour of the teeth themselves
is not, however, affected.