Whiten your teeth from the inside out by adding a layer of pearlys daily teethwhiten foam every time you brush pearlys daily teethwhiten foam also kills bacteria and helps keep your teeth and gums healthy and your breath freshdirections for use apply toothpaste to your toothbrush as normal then apply a thin layer of pearlys daily teeth whiten foam on top of your usual toothpaste brush for 24 minutes