First of all the facts on yellow teeth as provided by MedicalNewsToday:
*As the enamel on teeth wears, the yellowish dentin underneath starts to show through.
*An easy way of reducing discoloration of the teeth is to brush them frequently.

*As people age, their teeth will naturally become slightly discoloured.

11 ways to get rid of yellow teeth

Here are 11 ways that may help to get rid of yellow teeth at home. These are an alternative to teeth whitening options that a dentist may offer.
1. Brushing frequently
There are various teeth whitening options that can be tried at home or offered by dentists.
This is most important after consuming food or drink that may discolor the teeth, such as:
Here are some tooth brushing, best practice tips:

*brush two to three times a day

*brush for 2 to 3 minutes at a time

*be sure to brush every surface of each tooth

*make circular motions when brushing

*avoid brushing the gums or brush them very gently

*be sure to reach the teeth at the back of the mouth

2. Whitening toothpaste

Whitening toothpaste may help reduce yellowing of the teeth and improve whiteness. These products contain stronger ingredients than standard toothpaste, helping to remove tough food stains.

Whitening toothpaste does not contain bleach but may contain a small amount of carbamide peroxide or hydrogen peroxide. These chemicals help to lighten tooth color.

According to a 2014 study, whitening toothpaste typically lightens tooth color by one or two shades.

3. Tray-based tooth whiteners
Some dentists offer tray-based tooth whitening, but home versions are also available over-the-counter. Tray-based tooth whiteners can lighten the teeth by one or two shades.

This tooth whitening method involves wearing a fitted tray over the teeth. The tray contains a bleaching gel and is worn for 2 to 4 hours a day or overnight.

It is important to look for products that contain 10 percent carbamide peroxide. These are recommended as safe by the American Dental Association (ADA).

4. Whitening strips
Whitening strips deliver a thin layer of peroxide gel on plastic strips. These are shaped to fit onto the surface of the teeth.

There is a range of whitening strip products available online and instructions for them vary. Most suggest they should be applied twice a day for 30 minutes.

Strips can lighten the teeth by one or two shades. That said, a 2016 study notes there is no evidence whitening strips are any more effective than 10 percent carbamide peroxide gel. The use of carbamide peroxide gel is the ADA recommended method.
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