What are the best over-the-counter treatments for teeth whitening? Do you recommend them or can they damage the teeth?

To answer this question, you must understand that there are 2 different types of products available in pharmacies. The first is available in the form of "strips" or "trays" and contains peroxide that acts "deep" inside the tooth. The second one, mostly available as toothpaste, works by removing stains from the surface of the teeth. Strips" are known to be more effective than toothpaste, since the whitening is more pronounced and lasts longer. However, there are no large-scale studies that compare the effectiveness of strips (or toothpastes). However, you can search the ingredients of the products available in pharmacies for the product with the highest concentration of peroxide (carbamate). Theoretically, these products could be more effective than their lower concentration counterparts.

Personally, I do not recommend the use of "strips" because before using these products, it is better to see a dentist for 2 reasons. Firstly, some people have teeth that may not react well to the whitening product, which can have the opposite effect and therefore stain the teeth. Secondly, these whitening products work best after a thorough cleaning at the dentist.

These products can be irritating to teeth and gums, but there is every indication that careful use does not damage teeth. It is therefore important to use them for the intended duration and in the manner described in the instructions for use. They should also be discontinued immediately if tooth sensitivity develops.

According to the companies that market these products, it is usually necessary to repeat the application of the "strips" every 6 months to maintain optimal whitening and this frequency could be shorter for people who consume coffee, wine or who smoke. It is therefore important to know that the effect is unfortunately not permanent and that "whitening" toothpastes can be used to preserve the effect of the "strips" between applications.

Reference: Pharmacists Letter