1. Rice water: Rice water contains vitamin PP PP which will remove dirt around the roots of teeth, clean cavities, fight periodontitis and disinfect, reducing bad breath in the mouth.+ Take the first rice water+ Decant the solid water below the rice water and brush your teeth 1-2 times a day.+ Rinse with cold water+ Brush your teeth with toothpaste

2. Salt: Reduces yellowing, prevents and reduces tooth decay, inflammation, and gum diseases.+ Rinse with salt water+ Sprinkle a few grains of salt on the toothbrush and brush your teeth 1-2 times a day.+ Brush your teeth with toothpaste

3. Lemon juice: Because it contains a high amount of acid, lemon juice has the effect of whitening teeth quickly.+ Squeeze lemon juice into a little salt so that it is just enough to wet all the salt.+ Apply to teeth for about 5 minutes+ Rinse mouth with water+ Brush teeth again with toothpaste+ Because lemon has a lot of acid, only apply this teeth whitening method 2-3 times a week to avoid tooth erosion

4 . Banking soda: Like lemon, baking soda has a high acid content so it whitens teeth effectively+ Mix a little baking soda powder into toothpaste and brush your teeth.