There are more than 10 million bacteria on the average toothbrush, but not on Nano-b! By utilizing the natural antibacterial properties of gold and bamboo charcoal, Nano-b eliminates up to 99% of the bacteria that gets on your toothbrush. Gold –Half of the Nano-b Charcoal & Gold bristles are impregnated with genuine gold particles to safeguard your toothbrush from bacteria. This keeps your toothbrush clean and safe, which is what you want from a dental tool you put in your mouth every day. Charcoal – The other half of the bristles are impregnated with bamboo charcoal particles. Known for its natural whitening and toxin absorbing qualities, charcoal helps your teeth stay clean and white.