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Brushing teeth with lemon juice, or rubbing the peel across the teeth, is one of the most frequently mentioned ways to whiten teeth naturally. Unfortunately, it is also one of the worst.
lemons are bad for teeth whitening
The way lemon juice works (if you can call it that) is by robbing your tooth enamel of calcium from the citric acid in the juice. Not good, considering that teeth will decay much faster without the right amount of calcium. Lemon juice can also strip away the tooth enamel until it is damaged beyond repair. Lemon juice for teeth whiteningnot a good idea.