3 Hydrogen Peroxide
Hydrogen peroxide is a widely used bleaching agent and it can also help with teeth whitening. Moreover, it has anti-bacterial properties which are helpful in maintaining oral hygiene.
Hydrogen peroxide can be used in two different ways. The first is to use it as a mouth wash. For this purpose, you need to dilute it by adding water. Use equal amounts of hydrogen peroxide and water, and mix them. Use this mouth wash after brushing your teeth. The second way is to mix hydrogen peroxide with baking soda to form a paste of thick consistency. Brush the paste directly onto your teeth.
4 Activated Charcoal
Activated charcoal has been used since the olden days and has proven to be very effective. Activated charcoal has binding abilities and it literally binds away stains present on the teeth, leaving a white smile in their place.
It is available in the form of powder that can be applied directly to your tooth brush. Brush for 2 minutes and rinse thoroughly.