Foods that cause stains: Blueberries, beets, pomegranates, and dark meats all have the potential to discolour recently whitened teeth. In addition, tomatoes and any other dark sauces, soups, and stews should also be avoided. Chocolate and artificially-dyed candies can stain your teeth after they’ve been whitened. Foods or drinks that are extremely cold or hot: Overly sensitive teeth are a common but transitory side effect of whitening treatments. It’s suggested that you avoid excessively cold or hot food and beverages during your recovery to minimise discomfort. That includes iced drinks, boiling soups, and frozen desserts. Afterwards, you may be able to use a desensitising agent to alleviate excessive pain. Dark-coloured beverages: Dark-coloured beverages are off-limits when it comes to drinks. It includes coffee, tea, dark sodas, red wine, and most fruit juices.