The durability of teeth whitening varies from person to person and depends on several factors. Generally speaking, the results of teeth whitening can be visible for up to a couple of years. However, it can be shortened if you eat or drink coloring substances such as coffee, tea, red wine or smoking, which can cause the teeth to gradually return to their original color. To extend the shelf life, it is important to avoid coloring substances and to follow a good dental care routine. Some people choose to have regular touch-up treatments to maintain their results.