“Charcoal is like brushing with sandpaper — it will take off the stain, but in the long term, your teeth get yellower over time because you’re removing an enamel layer,” Winters say ...

In the response video, Dr Mackie said: "You might be brushing too hard, stripping away that white enamel." Being too enthusiastic with your teeth brushing is known to erode the hard outer layer of ...