Use this product for the next 12 weeks and you will see the results that you are looking for. Some users stand for the efficacy of these products. But there are some sectors that question the efficacy of whitening rinses in making the teeth whiter. The reason for this may lie in the amount of time that the water enriched with peroxide is in contact with the teeth. Because of this, the market is being flooded with different brands every time and because it is one of those procedures that are fast and effective without the pain (mostly), it is so very easy to ride the bandwagon; yet, side effects could happen even adversely if unbeknown to the customer, the products are not used as indicated. First off though, toothpastes no matter how it is advertised to whiten the teeth do not contain enough substances to alter the color of the teeth. What it contains are silica for example and some aluminum and calcium that will be enough to remove stains but not really to counter the natural discoloration of the teeth as it ages nor does it contain substances that react with the mineral structure to whiten a dark colored teeth. Even the permanent tooth that follows later invisibly white is cast. Through everyday wear and tear, the gaps between the rods fill up with debris, tannins and other coloration that stains it. Anything that is put in the mouth will leave its mark trough forming a pellicle film over the teeth which initiated in the pores between the rods. Here are some of the major benefits of cosmetic veneers and porcelain veneers: These veneers are best to cover worn enamel. The enamel deteriorates over time and this can be expected. In order to cover the wear and the deterioration, then the porcelain veneers can be used. Also the use of these veneers is best for wear and tear. For example there are specialize whitening centers that are present in major cities. And these special centers will have dentists that will check first the oral condition of the person before the whitening treatment can be suggested or performed. If for example there are other serious concerns relating to the oral health condition, then the practitioner will not recommend outright teeth whitening procedure.