Ever stopped to think about what's really on your toothbrush? Researchers at the University of Manchester did, uncovering millions of bacteria residing there.
No need to panic—your mouth naturally hosts diverse microorganisms, and your immune system effectively manages these. Common types include E. coli (also present in your gut) and staphylococci (associated with skin and wound infections). That said, keeping your toothbrush clean is key to optimal oral health.
Read also: "Is it bad to go to sleep without brushing your teeth?"
Bacteria thrive in moist conditions, so a protective case can trap humidity and foster growth. Rinse thoroughly after use, then air-dry upright. Store it away from the toilet to dodge aerosolized particles from flushing—always close the lid first. Use your own brush exclusively and avoid crowding multiples in one holder, as contact spreads bacteria.
Each brushing transfers plaque laden with bacteria to the bristles, steadily contaminating it. Swap your toothbrush every three months, or sooner if bristles fray. Electric toothbrush heads follow the same guideline.
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