Turmeric has gained popularity as a natural remedy for everything from inflammation to cooking, and some people have started using it to whiten their teeth. At first glance, it seems appealing: it’s a common kitchen spice, generally safe to use, and considered gentler than harsh whitening products or activated charcoal. Some proponents even claim that turmeric can help reduce the risk of gum disease.

But when it comes to actually whitening teeth, the science tells a different story.