The duration of the teeth whitening procedure is tailored to each individual's needs and the specific method chosen. For those opting for in-office treatments, the process typically takes approximately 60 to 90 minutes. The precise timing depends on factors such as the initial level of discoloration and the desired shade improvement. If you prefer the convenience of at-home treatments, results are achieved for several weeks. This gradual approach ensures a natural-looking transformation and allows you to monitor your progress closely.