Q. Will whitening harm my teeth?
A. Janina Sensitive and Extra Strength Whitening Toothpaste and the Liquid Toothpaste Spray are the only safe way to whiten teeth, as they have a non-abrasive formulation and rely on component bleaching rather than abrasion to achieve the whitening results.
In these abrasive toothpaste's it is the silica which will give teeth a whiter, brighter appearance. In actual fact the silica acts like sandpaper and rubs the protective enamel away, making teeth more susceptible to dental caries.
The Janina Sensitive Whitening Toothpaste has a RDA (Relative Dentine Abrasion) of 20 and the Janina Extra Strength Whitening Toothpaste has a RDA of 30, the RDA of the Liquid Toothpaste Spray is 0.
The RDA of other well-known oral health care products ranges between 80-180, acting like an emery board to teeth.