Nicotine stains are often one of the most visible signs of tobacco use. Here’s what Dr Hinduja says: “Over-the-counter whitening products can help lighten nicotine stains to some extent, especially for mild staining. However, they may not be as effective as professional teeth whitening treatments, particularly for deep-seated stains.” Dr Ahmad says that whitening toothpastes, strips, and gels contain mild …
