When using hydrogen peroxide for example, the concentration of the mix that is recommended at the back of the bottle should be adhered strictly if not less than what is recommended just to test it out. While studies have shown (Kugel et al) that the effect of peroxides at decreasing the tooth enamel is very insignificant, it nonetheless tends to make the teeth more sensitive for some time and when the proportion of the mix is on the strong side, the mix could result to painful gums and cause irritation to the surrounding tissues inside the mouth. The idea is to provide the customer with less messy, more convenient, least expensive but still provide effective whitening results compared to other teeth whitening home systems. Teeth whitening strips are very flexible, very easy to use thin strips of plastic coated with bleaching agents that stick to the teeth. There will be times when the procedure may be repeated more than once to ensure that the deep stains can be addressed. Can you still undergo the laser procedure even if you have sensitive teeth? The good news is that even if you have sensitive teeth, this will not be an issue when it comes to the laser approach to teeth whitening. Speaking of bleaching, this is what you need if you have yellow teeth. If you have brown or gray teeth, then bleaching will not be as effective as you will expect. When shopping for this product, do keep in mind that the crowns, the fillings and the veneers will not be affected by the whitening action of the paste. Not all teeth whitening products have the same bleaching agent concentration as peroxides that are marketed whether the hydrogen or the carbamide variant ranges from 10% to 20% strength, sometimes beyond that. Shop wisely. The safest route is to choose a small bottle in the mid strength range and test it. Once the women gave birth and has finished the lactating stage, then that is the time that whitening procedures are safer. For those with allergies, consider a stop first on the plans to have teeth whitening. This is especially true for everyone who is allergic to peroxide. Do you have a gum disease, exposed roots or you have worn enamel?