Blogs

Teeth usually look yellow for two reasons: surface stains from things like coffee, tea, wine and tobacco, or thinning enamel that lets the naturally yellow dentin underneath show through. Here are the 8 most common causes, which ones whitening can help with, and when to see a dentist.

Does whitening weaken or strip tooth enamel? Here's what peroxide actually does to your teeth, what studies show, which habits really put enamel at risk, and how to whiten more gently.