Remedy 3: Brushing your teeth and whitening toothpaste
The first and foremost line of defense against yellow teeth is brushing often and correctly. Start by brushing at least twice a day for about two minutes each time. Use a mirror to ensure you are reaching all sides of the teeth, gums and all of the crevices in between. You can also begin brushing after consuming foods and beverages that cause yellowing. (However, don’t brush immediately after consuming acidic products since this can erode the enamel.)
Additionally, add whitening toothpaste into your routine. They contain mild abrasives that scrub the surface of the tooth to remove stains without damaging them, says a 2018 study.