Some foods can help: crunchy apples and celery mildly polish surface areas; while not an alternative to whitening
https://www.mediafire.com/file/o3befn9icv9m7xv/pdf-54850-44416.pdf/file
Some foods can assist: crunchy apples and celery slightly polish surfaces; while not an alternative to whitening, they support a cleaner, brighter-looking smile.