It’s no longer a secret, or almost, but baking soda is a natural product that can be very effective in whitening teeth quickly.
Of course, you have to be careful not to overdo it, because using baking soda too often can damage the enamel of your teeth and thus weaken them forever. So you can sprinkle some baking soda on the toothpaste on your brush and start brushing your teeth as usual.
In order not to damage the enamel, it is advisable to brush the teeth with this solution once a week, maximum. After a few weeks your teeth will be much whiter thanks to this grandmother’s remedy.