For this you do not need to spend too much effort and expense. Just look in your kitchen and you will find many things there which can help you in removing the yellowing of your teeth.
Come, learn about some such home remedies…
Third party image reference
Apple vinegar Apple cider vinegar can remove the yellowing of your teeth, giving you a white and bright smile. Just take half a teaspoon of apple vinegar in about a cup of water and brush it on the teeth with the help of your toothbrush until your teeth are completely clean. With the removal of tooth stains, it will gradually shine on your teeth.
Third party image reference

Mix salt and a little mustard oil in lemon juice and now brush your teeth with the help of a brush. This is a very old and successful method of giving teeth a glow.
Rub the inner part of the banana peel on the teeth and then rinse it with lukewarm water. Yellowing of teeth will begin to decrease gradually.
Third party image reference
Keep these things in mind when using apple vinegar:
When using apple vinegar, stir the bottle well, only use it.
It can be harmful to use without mixing it in water, because it is a natural acid. That is, it is of ascetic nature.
Avoid excessive use of it and do not use it more than once a day.