Home > Medical > Oral-health > Dental care 9 things you didn’t know could stain your teeth 1. Mouthwashes 2. White wine 3. Certain medications 4. Over-whitening your pearly whites 5. Sugar 6. Berries 7. Citrus and acidic foods 8. Nicotine 9. Illness and treatments Hide Thumbnails Share on Facebook Share on Twitter Share on Google+