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Yes, when used as directed, teeth whitening strips are generally safe to use.

While LED tooth whitening shows promise, some studies suggest that LED lights improve bleaching only slightly or not at all for some people. Short-term effects. If you enjoy coffee, tea, or wine, you may be unhappy with the long-term results of your tooth whitening.

"If the stains on your teeth are difficult or ingrained, it's unlikely to work," he says. "But if your issue is with surface stains, such as those from coffee, tea, red wine, berries or sauces, products like HiSmile may reduce their colour, leaving you with less staining on your teeth."