This has been such an issue for us!

Certain foods and beverages can lead to staining, while others can help maintain and even improve the natural whiteness of teeth. Reducing the intake of coffee, tea, red wine, and dark-colored berries can help prevent further staining. Incorporating crunchy fruits and vegetables like apples, carrots, and celery can act as natural abrasives, helping to clean teeth surfaces. Calcium-rich foods such as cheese and yogurt may also promote stronger, whiter teeth by protecting enamel.

There are several at-home remedies that your mother can try to naturally whiten her teeth. Baking soda, known for its mild abrasive properties, is often used to remove surface stains. She can brush with a paste made of baking soda and water a few times a week. Another option is oil pulling, which involves swishing coconut oil in the mouth for several minutes. This ancient practice is believed to reduce bacteria and potentially whiten teeth.