Some foods can help: crunchy apples and celery slightly polish surface areas; while not a replacement for whitening

https://telegra.ph/Post-Invisalign-Whitening-Finishing-Your-Smile-Transformation-04-17

Some foods can assist: crunchy apples and celery mildly polish surface areas; while not a substitute for whitening, they support a cleaner, brighter-looking smile.