My Listerine mouthwash bottle directions says that for best results use twice a day after brushing. My toothpaste has 1450ppm fluoride, whereas the mouthwash is only 450ppm. Won’t using the mouthwash afterwards simply wash away the higher, more beneficial levels of toothpaste fluoride and replace it with lower mouthwash levels? What’s the reasoning for this advice?
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The primary purpose of mouthwash is to kill or slow the growth certain bacteria that live on and inflame your gums. These are bacteria that come from the food we eat and infect your gums when that food gets stuck in between your teeth. In order for it to work, it needs to come in contact with the effected areas of your gums (namely around your teeth) so your teeth need to be cleaned first to maximize the gum surface that the mouthwash touches
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