Malic acid or vinegar
This bleaching option should be used carefully because of the rather aggressive components. The most extreme way – vinegar rinses, but they are unpleasant in taste. After the procedure, vinegar must be spat out and rinsed thoroughly with water. Like lemon, you can add soda to vinegar.
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The resulting mixture is applied to the teeth and left for 5-10 minutes, then, as a rule, rinse your mouth and brush your teeth.
