2, orange peel brushing: orange peel contains limonene, which is a pure natural solvent. You only need to rub your teeth with the white part of the orange peel to whiten your teeth.
3. Use whitening and spot-removing toothpaste: At present, there are many whitening toothpastes on the market, so you can choose to buy products of big brands. In whitening toothpaste, sodium phytate is generally used to remove stains, which can remove tea stains and tobacco stains and effectively solve the problem of black and yellow teeth.
4. Brush your teeth with salt: When you brush your teeth, you can whiten your teeth by mixing salt with toothpaste. After everyone squeezes the toothpaste onto the toothbrush, just dip some salt in it. Stick to brushing your teeth with salt twice a day, and generally you can see the effect in one week.