Why is that desirable in toothpaste? Because it works as something of a detergent, and makes the toothpaste foam to help it spread around inside your mouth easier.

THE VERDICT: The paste transforms to foam in your mouth in order to penetrate hard-to-reach places. But foaming action is strictly a matter of personal preference -- you don't get a "skip flossing ...

At first glance, Bite toothpaste bits look like candy mints, but once you bite down and start brushing with a wet toothbrush, it foams up just like the standard toothpaste you’re used to — but ...

According to Dr. Nguyen: “While SLS-free toothpastes may lack the foaming properties of regular toothpaste that help to remove debris from tooth surfaces, that doesn’t mean they can’t be ...