Some people have naturally yellow teeth. These people do not have a tooth problem. In https://www.randwicksmiles.com.au/yellow-teeth-causes-and-effects/ you can read more about the causes.
Not only do braces make it difficult to eat at the beginning, they might also generate bad breath if you don’t clean them regularly. Some of the trusted orthodontists in Sutherland give the following advice about what should you not eat when you have braces.