How fast you reach results will depend on several factors, including, but not limited to, pre-existing staining, the strength of your natural tooth enamel, all of the instructions in the kit being followed, etc. Even the foods and drinks you consume before and after each application can have an effect on your overall results. We recommend not smoking and avoiding staining and acidic foods and beverages during the entire length of treatment and within 24 hours after your full treatment (if you must consume staining foods/beverages, try doing so with a straw).
You may see results in as little as 1–3 applications if your tooth enamel is very porous, you have little to no pre-existing staining, and you follow the recommendation of avoiding staining foods and beverages during your treatment.