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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Dental hygienist here, this is the answer!
Also mouthwash really isn’t needed, like you said. It’s nice for fresh breath and helps after meals, but the important part of dental hygiene is flossing and brushing. Listerine will give advice on their bottles and advertise what they want, but it’s not correct. If you do choose to use mouthwash make sure it’s alcohol-free: you don’t want to kill the good bacteria and you don’t want to irritate your gums
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